states.
@param bitmap
- The bitmap to display in the button. May be invalid to remove any
- currently displayed bitmap.
+ The bitmap to display in the button. Under wxGTK the bitmap can be
+ invalid to remove the currently displayed bitmap, however this is
+ not supported in wxMSW currently.
@param dir
The position of the bitmap inside the button. By default it is
positioned to the left of the text, near to the left button border.