public static IntPtr SetWindowsHookEx(HookType hookType, HookProc lpfn, IntPtr hMod, uint dwThreadId)
{
// TODO: SetWindowsHookEx currently ignores the module and thread.
int handle = PInvoke.AllHooks.Count + 1;
List <Delegate> hooks = PInvoke.Hooks[hookType];
PInvoke.AllHooks.Add(Tuple.Create <HookType, Delegate, int>(hookType, lpfn, hooks.Count));
hooks.Add(lpfn);
XnaToFnaHelper.Log($"[PInvokeHooks] Added global hook #{handle} of type {hookType}");
return((IntPtr)handle);
}
public static bool ClipCursor(ref Rectangle rect)
{
unsafe
{
fixed(Rectangle *rect_ = &rect)
if ((long)rect_ == 0)
{
// MSDN: If this parameter is NULL, the cursor is free to move anywhere on the screen.
XnaToFnaHelper.Log($"[CursorEvents] Cursor released from ClipCursor");
MouseEvents.Clip = null;
return(true);
}
}
XnaToFnaHelper.Log($"[CursorEvents] Game tries to ClipCursor inside {rect}");
MouseEvents.Clip = rect;
return(true);
}
public static uint GetWindowThreadProcessId(IntPtr hWnd, ref uint lpdwProcessId)
{
Form form = Control.FromHandle(hWnd) as Form;
if (form == null)
{
XnaToFnaHelper.Log($"[PInvokeHooks] Called GetWindowThreadProcessId for non-existing hWnd {hWnd}");
form = GameForm.Instance;
}
// Yes, that's required, as DLC Quest passes IntPtr.Zero
unsafe {
fixed(uint *lpdwProcesId_ = &lpdwProcessId)
if ((long)lpdwProcesId_ != 0)
{
lpdwProcessId = 0; // Optional
}
}
return((uint)(form?.ThreadId ?? 0));
}
public static int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong)
{
// All other nIndex values seem to be style-related.
if (nIndex == -4)
{
Form form = Control.FromHandle(hWnd)?.Form;
if (form == null)
{
return(0);
}
IntPtr prevHook = form.WindowHookPtr;
form.WindowHookPtr = (IntPtr)dwNewLong;
form.WindowHook = Marshal.GetDelegateForFunctionPointer(form.WindowHookPtr, typeof(WndProc));
XnaToFnaHelper.Log($"[PInvokeHooks] Window hook set on ProxyForms.Form #{form.GlobalIndex}");
return((int)prevHook);
}
return(0);
}
public static IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam)
{
// This gets called when Duck Game dies...
// TODO: Find more games using SendMessage.
Form form = Control.FromHandle(hWnd) as Form;
if (form == null)
{
XnaToFnaHelper.Log($"[PInvokeHooks] Called GetWindowThreadProcessId for non-existing hWnd {hWnd}");
form = GameForm.Instance;
}
if (Msg == 16 /*WM_CLOSE*/)
{
form.Close();
// TODO: What's the proper return value for SendMessage on WM_CLOSE?
return(IntPtr.Zero);
}
return(IntPtr.Zero);
}