mouse events from a non-client area of a control

Question

Is there a way to get mouse events from a non-client area of a control?

I tried to override the WndProc of the control but it doesnt seem to get any WM_NCMOUSEMOVE Messages.

 

I also seek a way to change the mouse cursor when its on the non-client area, even if i change the cursor property of the control the cursor still becomes an arrow when the mouse is over the non-client area

 

thanks in advance

 

 

Answer 1

To have mouse messages over the non-client area, you should first have a non-client area. To get that, handle: WM_NCCALCSIZE to notify windows about the non-client-area. After that, you should deal with WM_NCHITTEST and return a non-client area value, like HTTOPLEFT or HTCAPTION to notify windows that the mouse is currently NOT on the Client Area.

 

Then you will receive WM_NCMOUSEMOVE messages.

 

For details on those messages:

 

WM_NCCALCSIZE

http://msdn2.microsoft.com/en-us/library/ms632634(VS.85).aspx

 

WM_NCHITTEST

http://msdn2.microsoft.com/en-us/library/ms645618(VS.85).aspx