bool OnWM_MESSAGE256(ref System.Windows.Interop.MSG msg, ref bool handled)
{
// // add extra variables to observe with Debugger //
IntPtr HWND, WParam, LParam;
HWND = msg.hwnd;
WParam = msg.wParam;
LParam = msg.lParam;
this.txt_HWND.Text = HWND.ToString();
this.txt_WParam.Text = WParam.ToString();
this.txt_LParam.Text = LParam.ToString();
this.txt_KeyData.Text = KeyInterop.KeyFromVirtualKey(WParam.ToInt32()).ToString();//keyData.ToString();
return(true);
}
public static void ReleaseDCChecked(HWND hWnd, HDC hDC)
{
int res = ReleaseDC(hWnd, hDC);
if (res != 1)
{
throw new InvalidOperationException($"{nameof(ReleaseDC)} failed. Window handle: 0x{hWnd.ToString("X16")}. HDC: 0x{hDC.ToString("X16")}.");
}
}
public static HDC GetDCChecked(HWND hWnd)
{
HDC hdc = GetDC(hWnd);
if (hdc == IntPtr.Zero)
{
throw new InvalidOperationException($"{nameof(GetDC)} failed. Window handle: 0x{hWnd.ToString("X16")}.");
}
return(hdc);
}