🚀 go-pugleaf

Patryk B. wrote:

>Im traying to prevent to close my application.
>I know its function OnCloseQuery but i want to prevent closing
> from Task Manager too.
>In know that global hook should be placed in DLL.
>But I want hook only for my application.

Then you should try hooking in WinMain instead of TForm6::Button1Click
And be aware that non-DLL hooks are for one thread only.

>What is wrong? It dont detect WM_QUIT.

Could it be that VCL doesn't post that message?
In any case, the window will have already been destroyed (WM_DESTROY)
before WM_QUIT is posted. Also, WM_DESTROY comes _after_ the window is destroyed.
It would probably be easier to just place a while(1){} around
the application code in WinMain, than to try to stop WM_QUIT.

I think you want to catch it even sooner.
You might look into WM_SYSCOMMAND-SC_CLOSE

>LRESULT CALLBACK GetMsgProc(int nCode, WPARAM wParam, LPARAM lParam)

I'm not sure what the ncode is for WM_QUIT, but it might be other than HC_ACTION.
You might check all messages.
It might also be a good idea to use the WinAPI instead of VCL code in the handler.