BCGControlBar Pro for MFC
BOOL CBCGPToolBarImages::IsValid ( ) const
inline

Determines if a CBCGPToolBarImages object is valid.

Returns
Nonzero if a CBCGPToolBarImages object is valid; otherwise 0.

Use this function to determine whether a CBCGPToolBarImages object is valid or not. The object is not valid when its handle to bitmap with toolbar images is NULL.