BCGControlBar Pro for MFC
BOOL CBCGPMDIFrameWnd::SetMDITabStateAnimationImages ( UINT  uiAnimImagesResID,
int  cx = 16,
BOOL  bDPIAutoScale = TRUE,
COLORREF  clrTransp = RGB(255, 0, 255) 
)

Sets MDI tab state animation images.

Parameters
uiAnimImagesResIDIdentifier for the animation images resource.
cxThe icon width.
bDPIAutoScaleSpecifies whether the image should be scaled according to current DPI.
clrTranspThe transparent color.
Returns
TRUE if it succeeds, FALSE if it fails.