问题
I have a problem, a bit related to: C# Winforms Transparent Control allowing Clickthrough
Contrary to him I would like to capture mouse events on my program, while still retaining a "window" to whats behind my program. color.transparent doesn't work, and transparency key just delivers mouse events to whatever is underneath. Using a panel with transparent BackColor or with a BackColor equal to transparency key does not give the desired effect.
回答1:
If you need to capture the mouse events, and that's include the MouseClick, then simply use transparency, but don't set it to 0 set it to 1.
It will be transparent enough to see through, but because it's non-zero the mouse events will be processed the the front-most window.
来源：https://stackoverflow.com/questions/2547425/c-sharp-winforms-transparent-control-allowing-clickthrough