I have a standard combobox in a frame on a form. I have some code that makes the frame transparent i.e. it BitBlts the underlying portion of the form onto the frame with a mask to make it seem transparent (I have a gradient background on the form that I want the frame to show)
When the combobox is clicked, the drop down window covers part of my frame. When the drop down window closes the part of the frame under the dropdown window that was "transparent" now shows the frame backcolour while the rest of the frame is transparent as before.
What I want to be a ble to do is hook the combo closeup message (or whatever the appropriate message is) to trigger a redraw of my frame transparency code. I do not wish to use a timer to trigger the redraw repeatedly, I am looking for a lower level solution.
Thanks in advance