LX-300 Printing Problem

Question

HI,I am using the Program developed in VFP, from the program i need to print checks of 4x8 size but when i m printing using custumized page setting priter still rolls up to the size of A4 and then prints the 2nd chk How cn i stop the priter tractor as soon as printing is finishedCan any please help solving my this problem ASAP.Thanks