unsigned short get_class_part(handle window, int Index)
This function obtains a part in class memory at a given offset.
The handle of the window of the class.
The 0-based index into class memory of the part.
The part at the given offset or zero if an error occurred.
The 0-based byte index into the extra class memory ranges up to the number of bytes of extra memory minus 2. Extra class memory is reserved when registering a class.
Apart from valid positive values, the negative index values listed in the following table may be used.
|An atom value that uniquely identifies the window class. This is the same atom that is returned when registering the class.
|The handle of the small icon of the window.