BCGControlBar Pro for MFC
void CBCGPButton::SetImage ( HICON  hIcon,
BOOL  bAutoDestroy = TRUE,
HICON  hIconHot = NULL,
HICON  hIconDisabled = NULL,
BOOL  bAlphaBlend = FALSE,
HICON  hIconPressed = NULL 
)

Specifies an image to be displayed on the button

Call this member function to set a new button's image.

Parameters
hIconHandle to the icon that contains the bitmap and mask for the new image
bAutoDestroySpecifies whether the bitmap resources should be destroyed automatically.
hIconHotHandle to the icon that contains the bitmap and mask for the hot image
hIconDisabledA handle to icon used for disabled image.
bAlphaBlendSet this parameter to TRUE for 32-bit images with alpha channel only.
hIconPressedA handle to icon used for pressed image.