Question:
In WinForms I used the following block of code to stop the application gaining focus by being clicked on:
private const int WM_MOUSEACTIVATE = 0x0021; private const int MA_NOACTIVATEANDEAT = 0x0004; protected override void WndProc(ref Message m) { if (m.Msg == WM_MOUSEACTIVATE) { m.Result = (IntPtr)MA_NOACTIVATEANDEAT; return; } base.WndProc(ref m); } Is there any alternative to this in a WPF application? Can I use a HwndSource? Here is what I have so far (WM_MOUSEACTIVATE alone does not work as required and the application still gets focus):
protected override void OnSourceInitialized(EventArgs e) { base.OnSourceInitialized(e); HwndSource source = PresentationSource.FromVisual(this) as HwndSource; source.AddHook(WndProc); } private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) { // Handle messages... int WM_MOUSEACTIVATE = 0x0021; int WM_LBUTTONDOWN = 0x0201; //513 int WM_LBUTTONUP = 0x0202; //514 int WM_LBUTTONDBLCLK = 0x0203; //515 if (msg == WM_MOUSEACTIVATE || msg == MA_NOACTIVATEANDEAT || msg == WM_LBUTTONDOWN || msg == WM_LBUTTONUP || msg == WM_LBUTTONDBLCLK) { handled = true; } return IntPtr.Zero; } How can I get the Message Result?
Solution:1
Resolved by using:
private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) { // Handle messages... int WM_MOUSEACTIVATE = 0x0021; if (msg == WM_MOUSEACTIVATE ) { handled = true; return new IntPtr(MA_NOACTIVATEANDEAT); } return IntPtr.Zero; } Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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