The WM_SIZE message is sometime not
The control wasn't compatible with Delphi
If the button is a checkbox or a radio
button the pressed state bitmap is not displayed correctly.
If a bitmap for the normal state has not
been defined, putting a bitmap for the pressed state will have no
An animation associated to the
pressed state of the button will not start correctly when the
button is pressed
The MouseOut event is not fired in a
Setting a color for the pressed state
caption text will work only when the button is pressed by the
mouse action: although this is a correct behaviour for normal Push
buttons, it's not correct for Check boxes and Radio buttons.
In Visual Basic, setting a system color
instead of a RGB color, will result in a black color.
Under MS Access, if you move a form with
our controls outside of the screen area and then move it again
inside the screen area, the controls will not repaint correctly.
The mouse movement outside the surface of
a button playing an animation will cause the animation to be
restarted from the beginning.