03-30-2013, 06:03 AM
Maybe initial size is small. Static bitmaps are autoresized depending on image size, and then only the initial rectangle is used for tooltip.
Or use SS_NOTIFY style instead of tooltip flag 1. Without this style the control is transparent to mouse messages, and therefore Windows does not see a control there.
Or use SS_NOTIFY style instead of tooltip flag 1. Without this style the control is transparent to mouse messages, and therefore Windows does not see a control there.