RMC_SaveBMP function.
Saves a PowerBASIC 8.xx bitmap as *.jpg or *.png-file
Syntax
	nResult (LONG) = RMC_SaveBMP( ByVal hBmp (LONG), ByRef sFileName (ASCIIZ) )
Parameter
	hBmp (LONG)
		Handle of the bitmap, which you get with GRAPHIC BITMAP NEW when you create a new GRAPHIC BITMAP in PowerBASIC.
	sFileName (ASCIIZ)
		Name of the file, in which the bitmap shall be saved. The file extension can be either JPG ("myfile.jpg") or PNG ("myfile.png").
Return value
	0
		No error, function succeeded.
	RMC_ERROR_INIGDIP
		Error while initializing GDIPLUS.DLL.