I have created an ownerdrawn button and would like to be
able to specify that a tooltip will appear only when the
cursor is within a specific region in the button. I managed
to control when the tooltip shows by overriding WM_NCHITTEST
but I don't know how to force the tip to pop, when the mouse
exits the region (I tried overriding WM_TOOLHITTEST in the
parent container -CView derived- to no avail). Any pointers?