How do I detect when modal title bar is done blinking with WndProc?

I have a VB.net MDI app that contains a modal window (normal window shown as modal). I have a custom title bar button that disappears if the user clicks outside the modal area.

Normally, clicking off a modal will cause the system to beep and then flash the titl开发者_运维问答e bar of the modal window.

I want to know how to detect when the flashing is complete (using WndProc if possible) so I can redraw the custom button.

Anyone know how this could be done? Thanks!

It's been a while, but I believe your window should be receiving a WM_NCPAINT message when the frame needs to repaint.

It turns out that I had the WndProc(m) line in the wrong spot.