/// <summary>
/// This is a generic wndproc. It is the callback for all hooked
/// windows. If we get into this function, we look up the hwnd in the
/// global list of all hooked windows to get its message map. If the
/// message received is present in the message map, its callback is
/// invoked with the parameters listed here.
/// </summary>
/// <param name="hwnd">The handle to the window that received the
/// message</param>
/// <param name="msg">The message</param>
/// <param name="wParam">The message's parameters (part 1)</param>
/// <param name="lParam">The messages's parameters (part 2)</param>
/// <returns>If the callback handled the message, the callback's return
/// value is returned form this function. If the callback didn't handle
/// the message, the message is forwarded on to the previous wndproc.
/// </returns>
private static int WindowProc(
IntPtr hwnd, uint msg, uint wParam, int lParam)
{
if (hwndDict.ContainsKey(hwnd))
{
HookedProcInformation hpi = hwndDict[hwnd];
if (hpi.messageMap.ContainsKey(msg))
{
WndProcCallback callback = hpi.messageMap[msg];
bool handled = false;
int retval = callback(hwnd, msg, wParam, lParam, ref handled);
if (handled)
{
return(retval);
}
}
// if we didn't hook the message passed or we did, but the
// callback didn't set the handled property to true, call
// the original window procedure
return(hpi.CallOldWindowProc(hwnd, msg, wParam, lParam));
}
System.Diagnostics.Debug.Assert(
false, "WindowProc called for hwnd we don't know about");
return(Win32.DefWindowProc(hwnd, msg, wParam, lParam));
}
private static int WindowProc(IntPtr hwnd, uint msg, uint wParam, int lParam)
{
if (!hwndDict.ContainsKey(hwnd))
{
return(Win32.DefWindowProc(hwnd, msg, wParam, lParam));
}
HookedProcInformation information = hwndDict[hwnd];
if (information.messageMap.ContainsKey(msg))
{
WndProcCallback callback = information.messageMap[msg];
bool handled = false;
int num = callback(hwnd, msg, wParam, lParam, ref handled);
if (handled)
{
return(num);
}
}
return(information.CallOldWindowProc(hwnd, msg, wParam, lParam));
}