From 47a45386e9b2d68ac697177699e6d27fd2a558fe Mon Sep 17 00:00:00 2001
From: Thorvald Natvig <slicer@users.sourceforge.net>
Date: Sat, 27 Feb 2010 23:43:59 +0100
Subject: [PATCH] Reprotect WindowFromPoint after patching

---
 src/mumble/GlobalShortcut_win.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mumble/GlobalShortcut_win.cpp b/src/mumble/GlobalShortcut_win.cpp
index 7dd78ceb8..4273c50f2 100644
--- a/src/mumble/GlobalShortcut_win.cpp
+++ b/src/mumble/GlobalShortcut_win.cpp
@@ -74,6 +74,7 @@ GlobalShortcutWin::GlobalShortcutWin() {
 			f[i] = ucWindowFromPointNew[i];
 
 		FlushInstructionCache(GetCurrentProcess(), f, 6);
+		VirtualProtect(f, 6, oldProtect, &oldProtect);
 	} else {
 		qWarning("GlobalShortcutWin: Failed to patch WindowFromPoint");
 	}
@@ -95,8 +96,11 @@ HWND WINAPI GlobalShortcutWin::HookWindowFromPoint(POINT p) {
 	if (g.ocIntercept)
 		return g.ocIntercept->qgv.winId();
 
+	DWORD oldProtect;
 	unsigned char *f = reinterpret_cast<unsigned char *>(&WindowFromPoint);
 
+	VirtualProtect(f, 6, PAGE_EXECUTE_READWRITE, &oldProtect);
+
 	for (int i=0;i<6;++i)
 		f[i] = ucWindowFromPointOrig[i];
 	FlushInstructionCache(GetCurrentProcess(), f, 6);
@@ -107,6 +111,8 @@ HWND WINAPI GlobalShortcutWin::HookWindowFromPoint(POINT p) {
 		f[i] = ucWindowFromPointNew[i];
 	FlushInstructionCache(GetCurrentProcess(), f, 6);
 
+	VirtualProtect(f, 6, oldProtect, &oldProtect);
+
 	return hwnd;
 }
 #endif