diff --git a/sakura_core/dlg/CDialog.cpp b/sakura_core/dlg/CDialog.cpp
index 37944d8236..db4d05a0ba 100644
--- a/sakura_core/dlg/CDialog.cpp
+++ b/sakura_core/dlg/CDialog.cpp
@@ -22,6 +22,8 @@
 #include "StdAfx.h"
 #include <algorithm>
 #include <memory>
+#include <WinUser.h>
+
 #include "dlg/CDialog.h"
 #include "CEditApp.h"
 #include "env/CShareData.h"
@@ -358,6 +360,11 @@ BOOL CDialog::OnSize( WPARAM wParam, LPARAM lParam )
 	return FALSE;
 }
 
+BOOL CDialog::OnSizing(WPARAM wParam, LPARAM lParam)
+{
+	return FALSE;
+}
+
 BOOL CDialog::OnMove( WPARAM wParam, LPARAM lParam )
 {
 	/* ダイアログの位置の記憶 */
@@ -376,6 +383,11 @@ BOOL CDialog::OnMove( WPARAM wParam, LPARAM lParam )
 	return TRUE;
 }
 
+int CDialog::OnNcHitTest(WPARAM wParam, LPARAM lParam)
+{
+	return ::DefWindowProc(m_hWnd, WM_NCHITTEST, wParam, lParam);
+}
+
 void CDialog::CreateSizeBox( void )
 {
 	/* サイズボックス */
@@ -408,6 +420,7 @@ INT_PTR CDialog::DispatchEvent( HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM l
 	case WM_SIZE:
 		m_hWnd = hwndDlg;
 		return OnSize( wParam, lParam );
+	case WM_SIZING:		return OnSizing( wParam, lParam );
 	case WM_MOVE:
 		m_hWnd = hwndDlg;
 		return OnMove( wParam, lParam );
@@ -420,6 +433,10 @@ INT_PTR CDialog::DispatchEvent( HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM l
 	case WM_CHARTOITEM:	return OnCharToItem( wParam, lParam );
 	case WM_HELP:		return OnPopupHelp( wParam, lParam );	//@@@ 2002.01.18 add
 	case WM_CONTEXTMENU:return OnContextMenu( wParam, lParam );	//@@@ 2002.01.18 add
+	case WM_NCHITTEST:
+		m_hWnd = hwndDlg;
+		SetWindowLongPtr(m_hWnd, DWLP_MSGRESULT, OnNcHitTest(wParam, lParam));
+		return TRUE;
 	}
 	return FALSE;
 }
diff --git a/sakura_core/dlg/CDialog.h b/sakura_core/dlg/CDialog.h
index fee57884b3..6d52bdcacb 100644
--- a/sakura_core/dlg/CDialog.h
+++ b/sakura_core/dlg/CDialog.h
@@ -90,8 +90,10 @@ class CDialog{
 	virtual BOOL OnDestroy( void );
 	virtual BOOL OnNotify(NMHDR* pNMHDR){return FALSE;}
 	BOOL OnSize();
-	virtual BOOL OnSize( WPARAM wParam, LPARAM lParam );
+	virtual BOOL OnSize(WPARAM wParam, LPARAM lParam);
+	virtual BOOL OnSizing( WPARAM wParam, LPARAM lParam );
 	virtual BOOL OnMove( WPARAM wParam, LPARAM lParam );
+	virtual int OnNcHitTest(WPARAM wParam, LPARAM lParam);
 	virtual BOOL OnDrawItem( WPARAM wParam, LPARAM lParam ){return TRUE;}
 	virtual BOOL OnTimer( WPARAM wParam ){return TRUE;}
 	virtual BOOL OnKeyDown( WPARAM wParam, LPARAM lParam ){return TRUE;}
diff --git a/sakura_core/dlg/CDlgFind.cpp b/sakura_core/dlg/CDlgFind.cpp
index 5b0e96c482..2fb93e143e 100644
--- a/sakura_core/dlg/CDlgFind.cpp
+++ b/sakura_core/dlg/CDlgFind.cpp
@@ -49,6 +49,15 @@ const DWORD p_helpids[] = {	//11800
 	0, 0
 };	//@@@ 2002.01.07 add end MIK
 
+static const SAnchorList anchorList[] = {
+	IDC_BUTTON_SEARCHPREV,				ANCHOR_RIGHT,
+	IDC_BUTTON_SEARCHNEXT,				ANCHOR_RIGHT,
+	IDC_BUTTON_SETMARK,					ANCHOR_RIGHT,
+	IDCANCEL,							ANCHOR_RIGHT,
+	IDC_BUTTON_HELP,					ANCHOR_RIGHT,
+	IDC_COMBO_TEXT,						ANCHOR_LEFT_RIGHT,
+};
+
 CDlgFind::CDlgFind()
 {
 	m_sSearchOption.Reset();
@@ -101,6 +110,21 @@ BOOL CDlgFind::OnInitDialog( HWND hwnd, WPARAM wParam, LPARAM lParam )
 	HFONT hFontOld = (HFONT)::SendMessageAny( GetItemHwnd( IDC_COMBO_TEXT ), WM_GETFONT, 0, 0 );
 	HFONT hFont = SetMainFont( GetItemHwnd( IDC_COMBO_TEXT ) );
 	m_cFontText.SetFont( hFontOld, hFont, GetItemHwnd( IDC_COMBO_TEXT ) );
+
+	RECT rc;
+	::GetClientRect(hwnd, &rc);
+	m_ptDefaultSizeClient.x = rc.right;
+	m_ptDefaultSizeClient.y = rc.bottom;
+
+	::GetWindowRect(hwnd, &rc);
+	m_ptDefaultSizeScreen.x = rc.right - rc.left;
+	m_ptDefaultSizeScreen.y = rc.bottom - rc.top;
+
+	m_rcItems.resize(_countof(anchorList));
+	for (int i = 0; i < _countof(anchorList); i++) {
+		GetItemClientRect(anchorList[i].id, m_rcItems[i]);
+	}
+
 	return bRet;
 }
 
@@ -397,6 +421,75 @@ BOOL CDlgFind::OnActivate( WPARAM wParam, LPARAM lParam )
 	return CDialog::OnActivate(wParam, lParam);
 }
 
+BOOL CDlgFind::OnSize(WPARAM wParam, LPARAM lParam)
+{
+	CDialog::OnSize(wParam, lParam);
+
+	POINT ptNew;
+	ptNew.x = LOWORD(lParam);
+	ptNew.y = HIWORD(lParam);
+
+	for (int i = 0; i < _countof(anchorList); i++) {
+		ResizeItem(GetItemHwnd(anchorList[i].id), m_ptDefaultSizeClient, ptNew, m_rcItems[i], anchorList[i].anchor);
+	}
+	return TRUE;
+}
+
+BOOL CDlgFind::OnSizing(WPARAM wParam, LPARAM lParam)
+{
+	RECT& rc = *(RECT*)lParam;
+
+	switch (wParam) {
+	case WMSZ_BOTTOMRIGHT:
+	case WMSZ_RIGHT:
+	case WMSZ_TOPRIGHT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.right = rc.left + m_ptDefaultSizeScreen.x;
+		}
+		break;
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_LEFT:
+	case WMSZ_TOPLEFT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.left = rc.right - m_ptDefaultSizeScreen.x;
+		}
+		break;
+	}
+
+	switch (wParam) {
+	case WMSZ_BOTTOM:
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_BOTTOMRIGHT:
+		rc.bottom = rc.top + m_ptDefaultSizeScreen.y;
+		break;
+	case WMSZ_TOP:
+	case WMSZ_TOPLEFT:
+	case WMSZ_TOPRIGHT:
+		rc.top = rc.bottom - m_ptDefaultSizeScreen.y;
+		break;
+	}
+
+	return TRUE;
+}
+
+int CDlgFind::OnNcHitTest(WPARAM wParam, LPARAM lParam)
+{
+	int ret = CDialog::OnNcHitTest(wParam, lParam);
+	switch (ret) {
+	case HTTOPLEFT:
+	case HTBOTTOMLEFT:
+		return HTLEFT;
+	case HTTOPRIGHT:
+	case HTBOTTOMRIGHT:
+		return HTRIGHT;
+	case HTBOTTOM:
+	case HTTOP:
+		return HTBORDER;
+	default:
+		return ret;
+	}
+}
+
 //@@@ 2002.01.18 add start
 LPVOID CDlgFind::GetHelpIdTable(void)
 {
diff --git a/sakura_core/dlg/CDlgFind.h b/sakura_core/dlg/CDlgFind.h
index 088c04af11..2c42530e7c 100644
--- a/sakura_core/dlg/CDlgFind.h
+++ b/sakura_core/dlg/CDlgFind.h
@@ -59,8 +59,15 @@ class CDlgFind final : public CDialog
 	BOOL OnDestroy() override;
 	BOOL OnBnClicked(int wID) override;
 	BOOL OnActivate( WPARAM wParam, LPARAM lParam ) override;	// 2009.11.29 ryoji
+	BOOL OnSize( WPARAM wParam, LPARAM lParam ) override;
+	BOOL OnSizing(WPARAM wParam, LPARAM lParam) override;
+	int OnNcHitTest(WPARAM wParam, LPARAM lParam) override;
 
 	// BOOL OnKeyDown( WPARAM wParam, LPARAM lParam ) override;
 	LPVOID GetHelpIdTable(void) override;	//@@@ 2002.01.18 add
+
+	POINT m_ptDefaultSizeScreen;
+	POINT m_ptDefaultSizeClient;
+	std::vector<RECT> m_rcItems;
 };
 #endif /* SAKURA_CDLGFIND_AF260AA4_6075_4B87_9F03_2CEEDAD64094_H_ */
diff --git a/sakura_core/dlg/CDlgGrep.cpp b/sakura_core/dlg/CDlgGrep.cpp
index eb910cbdb4..01f8995707 100644
--- a/sakura_core/dlg/CDlgGrep.cpp
+++ b/sakura_core/dlg/CDlgGrep.cpp
@@ -71,6 +71,20 @@ const DWORD p_helpids[] = {	//12000
 	0, 0
 };	//@@@ 2002.01.07 add end MIK
 
+static const SAnchorList anchorList[] = {
+	IDC_COMBO_TEXT,					ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_FOLDER,				ANCHOR_LEFT_RIGHT,
+	IDC_BUTTON_FOLDER,				ANCHOR_RIGHT,
+	IDC_BUTTON_FOLDER_UP,			ANCHOR_RIGHT,
+	IDC_BUTTON_CURRENTFOLDER,		ANCHOR_RIGHT,
+	IDC_COMBO_FILE,					ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_EXCLUDE_FILE,			ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_EXCLUDE_FOLDER,		ANCHOR_LEFT_RIGHT,
+	IDOK,							ANCHOR_RIGHT,
+	IDCANCEL,						ANCHOR_RIGHT,
+	IDC_BUTTON_HELP,				ANCHOR_RIGHT,
+};
+
 static void SetGrepFolder( HWND hwndCtrl, LPCWSTR folder );
 
 CDlgGrep::CDlgGrep()
@@ -359,6 +373,20 @@ BOOL CDlgGrep::OnInitDialog( HWND hwndDlg, WPARAM wParam, LPARAM lParam )
 		m_cFontDeleters[i].SetFont( hFontOld, hFont, hwndItem );
 	}
 
+	RECT rc;
+	::GetClientRect(hwndDlg, &rc);
+	m_ptDefaultSizeClient.x = rc.right;
+	m_ptDefaultSizeClient.y = rc.bottom;
+
+	::GetWindowRect(hwndDlg, &rc);
+	m_ptDefaultSizeScreen.x = rc.right - rc.left;
+	m_ptDefaultSizeScreen.y = rc.bottom - rc.top;
+
+	m_rcItems.resize(_countof(anchorList));
+	for (int i = 0; i < _countof(anchorList); i++) {
+		GetItemClientRect(anchorList[i].id, m_rcItems[i]);
+	}
+
 	return bRet;
 }
 
@@ -581,6 +609,75 @@ BOOL CDlgGrep::OnBnClicked( int wID )
 	return CDialog::OnBnClicked( wID );
 }
 
+BOOL CDlgGrep::OnSize(WPARAM wParam, LPARAM lParam)
+{
+	CDialog::OnSize(wParam, lParam);
+
+	POINT ptNew;
+	ptNew.x = LOWORD(lParam);
+	ptNew.y = HIWORD(lParam);
+
+	for (int i = 0; i < _countof(anchorList); i++) {
+		ResizeItem(GetItemHwnd(anchorList[i].id), m_ptDefaultSizeClient, ptNew, m_rcItems[i], anchorList[i].anchor);
+	}
+	return TRUE;
+}
+
+BOOL CDlgGrep::OnSizing(WPARAM wParam, LPARAM lParam)
+{
+	RECT& rc = *(RECT*)lParam;
+
+	switch (wParam) {
+	case WMSZ_BOTTOMRIGHT:
+	case WMSZ_RIGHT:
+	case WMSZ_TOPRIGHT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.right = rc.left + m_ptDefaultSizeScreen.x;
+		}
+		break;
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_LEFT:
+	case WMSZ_TOPLEFT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.left = rc.right - m_ptDefaultSizeScreen.x;
+		}
+		break;
+	}
+
+	switch (wParam) {
+	case WMSZ_BOTTOM:
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_BOTTOMRIGHT:
+		rc.bottom = rc.top + m_ptDefaultSizeScreen.y;
+		break;
+	case WMSZ_TOP:
+	case WMSZ_TOPLEFT:
+	case WMSZ_TOPRIGHT:
+		rc.top = rc.bottom - m_ptDefaultSizeScreen.y;
+		break;
+	}
+
+	return TRUE;
+}
+
+int CDlgGrep::OnNcHitTest(WPARAM wParam, LPARAM lParam)
+{
+	int ret = CDialog::OnNcHitTest(wParam, lParam);
+	switch (ret) {
+	case HTTOPLEFT:
+	case HTBOTTOMLEFT:
+		return HTLEFT;
+	case HTTOPRIGHT:
+	case HTBOTTOMRIGHT:
+		return HTRIGHT;
+	case HTBOTTOM:
+	case HTTOP:
+		return HTBORDER;
+	default:
+		return ret;
+	}
+}
+
 /* ダイアログデータの設定 */
 void CDlgGrep::SetData( void )
 {
diff --git a/sakura_core/dlg/CDlgGrep.h b/sakura_core/dlg/CDlgGrep.h
index cb67490d40..0ffbafad71 100644
--- a/sakura_core/dlg/CDlgGrep.h
+++ b/sakura_core/dlg/CDlgGrep.h
@@ -76,12 +76,19 @@ class CDlgGrep : public CDialog
 
 	std::vector<CFontAutoDeleter>	m_cFontDeleters;
 
+	POINT m_ptDefaultSizeScreen;
+	POINT m_ptDefaultSizeClient;
+	std::vector<RECT> m_rcItems;
+
 	/*
 	||  実装ヘルパ関数
 	*/
 	BOOL OnInitDialog(HWND hwndDlg, WPARAM wParam, LPARAM lParam) override;
 	BOOL OnDestroy() override;
 	BOOL OnBnClicked(int wID) override;
+	BOOL OnSize(WPARAM wParam, LPARAM lParam) override;
+	BOOL OnSizing(WPARAM wParam, LPARAM lParam) override;
+	int OnNcHitTest(WPARAM wParam, LPARAM lParam) override;
 	LPVOID GetHelpIdTable(void) override;	//@@@ 2002.01.18 add
 
 	void SetData( void ) override;	/* ダイアログデータの設定 */
diff --git a/sakura_core/dlg/CDlgGrepReplace.cpp b/sakura_core/dlg/CDlgGrepReplace.cpp
index 8891d7cf3f..7c79f6b480 100644
--- a/sakura_core/dlg/CDlgGrepReplace.cpp
+++ b/sakura_core/dlg/CDlgGrepReplace.cpp
@@ -66,6 +66,21 @@ const DWORD p_helpids[] = {
 	0, 0
 };
 
+static const SAnchorList anchorList[] = {
+	IDC_COMBO_TEXT,					ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_TEXT2,				ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_FOLDER,				ANCHOR_LEFT_RIGHT,
+	IDC_BUTTON_FOLDER,				ANCHOR_RIGHT,
+	IDC_BUTTON_FOLDER_UP,			ANCHOR_RIGHT,
+	IDC_BUTTON_CURRENTFOLDER,		ANCHOR_RIGHT,
+	IDC_COMBO_FILE,					ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_EXCLUDE_FILE,			ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_EXCLUDE_FOLDER,		ANCHOR_LEFT_RIGHT,
+	IDOK,							ANCHOR_RIGHT,
+	IDCANCEL,						ANCHOR_RIGHT,
+	IDC_BUTTON_HELP,				ANCHOR_RIGHT,
+};
+
 CDlgGrepReplace::CDlgGrepReplace()
 {
 	if( 0 < m_pShareData->m_sSearchKeywords.m_aReplaceKeys.size() ){
@@ -143,6 +158,20 @@ BOOL CDlgGrepReplace::OnInitDialog( HWND hwndDlg, WPARAM wParam, LPARAM lParam )
 	HFONT hFont = SetMainFont( GetItemHwnd( IDC_COMBO_TEXT2 ) );
 	m_cFontText2.SetFont( hFontOld, hFont, GetItemHwnd( IDC_COMBO_TEXT2 ) );
 
+	RECT rc;
+	::GetClientRect(hwndDlg, &rc);
+	m_ptDefaultSizeClient.x = rc.right;
+	m_ptDefaultSizeClient.y = rc.bottom;
+
+	::GetWindowRect(hwndDlg, &rc);
+	m_ptDefaultSizeScreen.x = rc.right - rc.left;
+	m_ptDefaultSizeScreen.y = rc.bottom - rc.top;
+
+	m_rcItems.resize(_countof(anchorList));
+	for (int i = 0; i < _countof(anchorList); i++) {
+		GetItemClientRect(anchorList[i].id, m_rcItems[i]);
+	}
+
 	return bRet;
 }
 
@@ -179,6 +208,75 @@ BOOL CDlgGrepReplace::OnBnClicked( int wID )
 	return CDlgGrep::OnBnClicked( wID );
 }
 
+BOOL CDlgGrepReplace::OnSize(WPARAM wParam, LPARAM lParam)
+{
+	CDialog::OnSize(wParam, lParam);
+
+	POINT ptNew;
+	ptNew.x = LOWORD(lParam);
+	ptNew.y = HIWORD(lParam);
+
+	for (int i = 0; i < _countof(anchorList); i++) {
+		ResizeItem(GetItemHwnd(anchorList[i].id), m_ptDefaultSizeClient, ptNew, m_rcItems[i], anchorList[i].anchor);
+	}
+	return TRUE;
+}
+
+BOOL CDlgGrepReplace::OnSizing(WPARAM wParam, LPARAM lParam)
+{
+	RECT& rc = *(RECT*)lParam;
+
+	switch (wParam) {
+	case WMSZ_BOTTOMRIGHT:
+	case WMSZ_RIGHT:
+	case WMSZ_TOPRIGHT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.right = rc.left + m_ptDefaultSizeScreen.x;
+		}
+		break;
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_LEFT:
+	case WMSZ_TOPLEFT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.left = rc.right - m_ptDefaultSizeScreen.x;
+		}
+		break;
+	}
+
+	switch (wParam) {
+	case WMSZ_BOTTOM:
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_BOTTOMRIGHT:
+		rc.bottom = rc.top + m_ptDefaultSizeScreen.y;
+		break;
+	case WMSZ_TOP:
+	case WMSZ_TOPLEFT:
+	case WMSZ_TOPRIGHT:
+		rc.top = rc.bottom - m_ptDefaultSizeScreen.y;
+		break;
+	}
+
+	return TRUE;
+}
+
+int CDlgGrepReplace::OnNcHitTest(WPARAM wParam, LPARAM lParam)
+{
+	int ret = CDialog::OnNcHitTest(wParam, lParam);
+	switch (ret) {
+	case HTTOPLEFT:
+	case HTBOTTOMLEFT:
+		return HTLEFT;
+	case HTTOPRIGHT:
+	case HTBOTTOMRIGHT:
+		return HTRIGHT;
+	case HTBOTTOM:
+	case HTTOP:
+		return HTBORDER;
+	default:
+		return ret;
+	}
+}
+
 /* ダイアログデータの設定 */
 void CDlgGrepReplace::SetData( void )
 {
diff --git a/sakura_core/dlg/CDlgGrepReplace.h b/sakura_core/dlg/CDlgGrepReplace.h
index e9659783e2..46f457616f 100644
--- a/sakura_core/dlg/CDlgGrepReplace.h
+++ b/sakura_core/dlg/CDlgGrepReplace.h
@@ -45,6 +45,9 @@ class CDlgGrepReplace final : public CDlgGrep
 protected:
 	CRecentReplace			m_cRecentReplace;
 	CFontAutoDeleter		m_cFontText2;
+	POINT m_ptDefaultSizeScreen;
+	POINT m_ptDefaultSizeClient;
+	std::vector<RECT> m_rcItems;
 
 	/*
 	||  実装ヘルパ関数
@@ -52,6 +55,9 @@ class CDlgGrepReplace final : public CDlgGrep
 	BOOL OnInitDialog(HWND hwndDlg, WPARAM wParam, LPARAM lParam) override;
 	BOOL OnDestroy() override;
 	BOOL OnBnClicked(int wID) override;
+	BOOL OnSize(WPARAM wParam, LPARAM lParam) override;
+	BOOL OnSizing(WPARAM wParam, LPARAM lParam) override;
+	int OnNcHitTest(WPARAM wParam, LPARAM lParam) override;
 	LPVOID GetHelpIdTable(void) override;	//@@@ 2002.01.18 add
 
 	void SetData( void ) override;	/* ダイアログデータの設定 */
diff --git a/sakura_core/dlg/CDlgReplace.cpp b/sakura_core/dlg/CDlgReplace.cpp
index aac234b14a..0fdb4d7d62 100644
--- a/sakura_core/dlg/CDlgReplace.cpp
+++ b/sakura_core/dlg/CDlgReplace.cpp
@@ -59,6 +59,18 @@ const DWORD p_helpids[] = {	//11900
 	0, 0
 };	//@@@ 2002.01.07 add end MIK
 
+static const SAnchorList anchorList[] = {
+	IDC_BUTTON_SEARCHPREV,				ANCHOR_RIGHT,
+	IDC_BUTTON_SEARCHNEXT,				ANCHOR_RIGHT,
+	IDC_BUTTON_SETMARK,					ANCHOR_RIGHT,
+	IDC_BUTTON_REPALCE,					ANCHOR_RIGHT,
+	IDC_BUTTON_REPALCEALL,				ANCHOR_RIGHT,
+	IDCANCEL,							ANCHOR_RIGHT,
+	IDC_BUTTON_HELP,					ANCHOR_RIGHT,
+	IDC_COMBO_TEXT,						ANCHOR_LEFT_RIGHT,
+	IDC_COMBO_TEXT2,					ANCHOR_LEFT_RIGHT,
+};
+
 CDlgReplace::CDlgReplace()
 {
 	m_sSearchOption.Reset();	// 検索オプション
@@ -363,6 +375,20 @@ BOOL CDlgReplace::OnInitDialog( HWND hwndDlg, WPARAM wParam, LPARAM lParam )
 	hFont = SetMainFont( GetItemHwnd( IDC_COMBO_TEXT2 ) );
 	m_cFontText2.SetFont( hFontOld, hFont, GetItemHwnd( IDC_COMBO_TEXT2 ) );
 
+	RECT rc;
+	::GetClientRect(hwndDlg, &rc);
+	m_ptDefaultSizeClient.x = rc.right;
+	m_ptDefaultSizeClient.y = rc.bottom;
+
+	::GetWindowRect(hwndDlg, &rc);
+	m_ptDefaultSizeScreen.x = rc.right - rc.left;
+	m_ptDefaultSizeScreen.y = rc.bottom - rc.top;
+
+	m_rcItems.resize(_countof(anchorList));
+	for (int i = 0; i < _countof(anchorList); i++) {
+		GetItemClientRect(anchorList[i].id, m_rcItems[i]);
+	}
+
 	return bRet;
 }
 
@@ -607,6 +633,75 @@ BOOL CDlgReplace::OnActivate( WPARAM wParam, LPARAM lParam )
 	return CDialog::OnActivate(wParam, lParam);
 }
 
+BOOL CDlgReplace::OnSize(WPARAM wParam, LPARAM lParam)
+{
+	CDialog::OnSize(wParam, lParam);
+
+	POINT ptNew;
+	ptNew.x = LOWORD(lParam);
+	ptNew.y = HIWORD(lParam);
+
+	for (int i = 0; i < _countof(anchorList); i++) {
+		ResizeItem(GetItemHwnd(anchorList[i].id), m_ptDefaultSizeClient, ptNew, m_rcItems[i], anchorList[i].anchor);
+	}
+	return TRUE;
+}
+
+BOOL CDlgReplace::OnSizing(WPARAM wParam, LPARAM lParam)
+{
+	RECT& rc = *(RECT*)lParam;
+
+	switch (wParam) {
+	case WMSZ_BOTTOMRIGHT:
+	case WMSZ_RIGHT:
+	case WMSZ_TOPRIGHT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.right = rc.left + m_ptDefaultSizeScreen.x;
+		}
+		break;
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_LEFT:
+	case WMSZ_TOPLEFT:
+		if (rc.right - rc.left < m_ptDefaultSizeScreen.x) {
+			rc.left = rc.right - m_ptDefaultSizeScreen.x;
+		}
+		break;
+	}
+
+	switch (wParam) {
+	case WMSZ_BOTTOM:
+	case WMSZ_BOTTOMLEFT:
+	case WMSZ_BOTTOMRIGHT:
+		rc.bottom = rc.top + m_ptDefaultSizeScreen.y;
+		break;
+	case WMSZ_TOP:
+	case WMSZ_TOPLEFT:
+	case WMSZ_TOPRIGHT:
+		rc.top = rc.bottom - m_ptDefaultSizeScreen.y;
+		break;
+	}
+
+	return TRUE;
+}
+
+int CDlgReplace::OnNcHitTest(WPARAM wParam, LPARAM lParam)
+{
+	int ret = CDialog::OnNcHitTest(wParam, lParam);
+	switch (ret) {
+	case HTTOPLEFT:
+	case HTBOTTOMLEFT:
+		return HTLEFT;
+	case HTTOPRIGHT:
+	case HTBOTTOMRIGHT:
+		return HTRIGHT;
+	case HTBOTTOM:
+	case HTTOP:
+		return HTBORDER;
+	default:
+		return ret;
+	}
+}
+
 //@@@ 2002.01.18 add start
 LPVOID CDlgReplace::GetHelpIdTable(void)
 {
diff --git a/sakura_core/dlg/CDlgReplace.h b/sakura_core/dlg/CDlgReplace.h
index 37c7491ab4..218807fc83 100644
--- a/sakura_core/dlg/CDlgReplace.h
+++ b/sakura_core/dlg/CDlgReplace.h
@@ -73,10 +73,17 @@ class CDlgReplace final : public CDialog
 	BOOL OnDestroy() override;
 	BOOL OnBnClicked(int wID) override;
 	BOOL OnActivate( WPARAM wParam, LPARAM lParam ) override;	// 2009.11.29 ryoji
+	BOOL OnSize(WPARAM wParam, LPARAM lParam) override;
+	BOOL OnSizing(WPARAM wParam, LPARAM lParam) override;
+	int OnNcHitTest(WPARAM wParam, LPARAM lParam) override;
 	LPVOID GetHelpIdTable(void) override;	//@@@ 2002.01.18 add
 
 	void SetData( void ) override;		/* ダイアログデータの設定 */
 	void SetCombosList( void );	/* 検索文字列/置換後文字列リストの設定 */
 	int GetData( void ) override;		/* ダイアログデータの取得 */
+
+	POINT m_ptDefaultSizeScreen;
+	POINT m_ptDefaultSizeClient;
+	std::vector<RECT> m_rcItems;
 };
 #endif /* SAKURA_CDLGREPLACE_37D62C07_5DAB_4CAC_A8B2_83C75329F8B7_H_ */
diff --git a/sakura_core/sakura_rc.rc b/sakura_core/sakura_rc.rc
index 79e4d6f6c7..b308114d82 100644
--- a/sakura_core/sakura_rc.rc
+++ b/sakura_core/sakura_rc.rc
@@ -62,7 +62,7 @@ END
 //
 
 IDD_FIND DIALOGEX 30, 0, 284, 93
-STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME
 EXSTYLE WS_EX_CONTEXTHELP
 CAPTION "検索"
 FONT 9, "ＭＳ Ｐゴシック", 0, 0, 0x1
@@ -129,7 +129,7 @@ BEGIN
 END
 
 IDD_GREP DIALOGEX 0, 0, 390, 188
-STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME
 EXSTYLE WS_EX_CONTEXTHELP
 CAPTION "Grep"
 FONT 9, "Yu Gothic UI", 0, 0, 0x1
@@ -175,7 +175,7 @@ BEGIN
 END
 
 IDD_GREP_REPLACE DIALOGEX 0, 0, 390, 202
-STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME
 EXSTYLE WS_EX_CONTEXTHELP
 CAPTION "Grep置換"
 FONT 9, "Yu Gothic UI", 0, 0, 0x1
@@ -240,7 +240,7 @@ BEGIN
 END
 
 IDD_REPLACE DIALOGEX 30, 0, 298, 149
-STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU
+STYLE DS_SETFONT | DS_CENTER | WS_POPUP | WS_VISIBLE | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME
 EXSTYLE WS_EX_CONTEXTHELP
 CAPTION "置換"
 FONT 9, "ＭＳ Ｐゴシック", 0, 0, 0x1