: tell the actual size of a TComboBox in it's dropped down
state before it drops down?
state before it drops down?
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message twice, once to drop it down, and once to retract it. Then send
a CB_GETDROPPEDCONTROLRECT message, passing the address of a TRect.
When the SendMessage call returns, the TRect will contain the
rectangle that would enclose the ComboBox in it's dropped down state,