CODEWITHSUNDEEP
winformsvisual-c++
ADringer
ADringer

Reputation: 2834

Using Windows Hooks to intercept mouse click on my application c++

In my C++ MFC application I have an ActiveX control on a form. At some point I create and show a new dialog. I don't want the user to be able to click the ActiveX control while this second dialog is up so I tried creating it as a child dialog. However the ActiveX control always appears above the child dialog in Z order. I have tried sending message on the create to change the Z order but nothing worked.

I've tried using Windows Hooks to intercept the mouse click using the following code:

GetWindowsHookEx(WH_MOUSE_LL, (HOOKPROC)CDWFDLG::ClickProc, GetModuleHandle(NULL), 0)

 LRESULT CALLBACK CDWFDLG::ClickProc(int ncode, WPARAM wparam, LPARAM lparam)
{

if(wparam == WM_LBUTTONDOWN)
{
    Beep(110, 30);
    return TRUE;
}
return CallNextHookEx(0, ncode, wparam, lparam);
}

This blocks all left mouse clicks which is what I want. However it does this on everything, not just on my application. I've tried setting the thread Id using 

GetCurrentThreadId()

and

GetWindowThreadProcessId(this->m_hWnd, &threadId )

However neither of these worked. What should I use to just get the hook to run on my application? Once this is working I was planning on using the coordinates of the click to check whether is was on the new dialog and handle it from there.

Thanks

Upvotes: 0

Views: 1566

Answers (2)

Sir Rogers
Sir Rogers

Reputation: 400

GetWindowsHookEx(WH_MOUSE_LL, (HOOKPROC)CDWFDLG::ClickProc, GetModuleHandle(NULL), 0)

Means you are hooking globally, all mouse clicks performed.

What you want is to hook WH_MOUSE, with the option GetCurrentThreadId() instead of 0, this will yield the results you want.

Upvotes: 1

ADringer
ADringer

Reputation: 2834

Although I couldn't fix the problem using Window Hooks, I think I've fixed it using the dialog properties. I've set the parent dialog's Control Parent to True and left everything else in the child dialog's properties to default (Control is false and and Style is Popup etc).

Now when I call the dialog through DoModal() it has focus and doesn't allow clicks on the ActiveX control.

Thanks

Upvotes: 0

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