I am working on a virtual keyboard the problem is when i press a key on the virtual keyboard the window witch the data needs to be sent loses focus. How can i avoid that ?
Press the Windows key, search for and open the Settings app. From the “settings” app click on “System” in the left sidebar and open “Focus Assist”. From there scroll down and either disable or configure all automatic rules so they don't turn on Focus Assist again.
Just press CTRL + SPACE on whatever window you want to stay on top. If it does not match mine, when you right-click, choose Open with and Choose another app.
Focus assist (also called quiet hours in earlier versions of Windows 10) allows you to avoid distracting notifications when you need to stay focused. It's set by default to activate automatically when you're duplicating your display, playing a game, or using an app in full screen mode.
In computing, focus stealing is a mode error occurring when a program not in focus (e.g. minimized or operating in background) places a window in the foreground and redirects all keyboard input to that window.
When your keyboard form receives focus, part of the message it receives is the handle of the window that lost focus (wParam). Do what you need to do and set the focus back to the window that lost focus.
EDIT: See the documentation on WM_SETFOCUS
EDIT 2:
Also, you could use the following when creating your custom form:
procedure TMainForm.CreateParams(var Params: TCreateParams) ;
//const WS_EX_NOACTIVATE = $8000000;
begin
inherited;
Params.ExStyle := Params.ExStyle + WS_EX_NOACTIVATE;
end;
To prevent your form from activating (taking focus from the other form). Like I alluded to in my comment, you should probably be using non-windowed controls for keys.
The only method I've seen to do what you want is to disable the window with the virtual keyboard EnableWindow(hWnd, FALSE)
.
Now, if the window is disabled you will not get mouse messages, right? You have to options:
WM_SETCURSOR
. It is sent even to disabled windows, and in the high-order word of lParam you have the identifier of the original message (WM_LBUTTONDOWN, etc.). The coordinates of the cursor can be read using GetMessagePos()
.SetWindowsHookEx(WH_MOUSE, ...)
. You'll have full control of your mouse messages.If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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