Sets the dmPrintQuality member of the DevMode. Sets the value of the 'Horizontal Resolution' edit box.
SetXDPI(xdpi As Integer, pBlackIceDEVMODE As Long) As Boolean
Input value: xdpi - Horizontal Resolution
Input value: pBlackIceDEVMODE - handle to the BlackIceDEVMODE.
Return value - TRUE if the member was successfully set, otherwise FALSE.
NOTE: For 32-bit applications , use pBlackIceDEVMODE as Integer, instead of Long.