当我单击CSplitterWnd中的行分隔符时，发送哪个消息？

Question

I have pane with vertical divider line. When I move this line on top or bottom, I got size message to List, which exists inside pane. But I can't find handler which responsible for messaging when I just click in line without moving.

My problem is: I make one click on line, without dragging, and all my controls which places in bottom pane has disappears. SetFocus doesn't work:(

Thank you

Answer 1

It is very easy to find the handler. Use Visual Studio's Find In File to search for "CSplitterWnd::OnLButtonDown" in the MFC source folder. When it finds that line you can double click on the line in the Find Results window and the source code will open at that line.