Ends a print job started by a call to the StartDoc member function.
Greater than or equal to 0 if the function is successful, or a negative value if an error occurred.
This member function replaces the ENDDOC printer escape, and should be called immediately after finishing a successful print job.
If an application encounters a printing error or a canceled print operation, it must not attempt to terminate the operation by using either EndDoc or AbortDoc. GDI automatically terminates the operation before returning the error value.
This function should not be used inside metafiles.