DeviceCapabilities DC_MAXEXTENT Fails on HP Laser Jet 1012

2005-02-11 01:59:41 AM
I'm not sure what newsgroup to put this to. I am using the
DeviceCapabilities function to try to make sure that the user is not trying
to print a report (8.5 x 11 size) to a label printer (which would probably
just print a ton of labels trying to get a report done) I am checking the
maximum page size and if its too small I let them know (and if they want to
proceed fine..) This has been working in the past but is failing on the HP
Laser Jet 1012 and I don't know if its a problem with the code or something
with HP's Driver. If anyone can point me in the right direction that would
be great, thanks! Here is the code I am doing:
bool BKPRINTERS::GetPrinterMaxSize(int PrinterIndex, double& Height, double&
if(PrinterIndex < 0 || PrinterIndex>= PrinterNameList->Count)
return false;
DWORD BufferLength;
AnsiString PrinterName = PrinterNameList->Strings[PrinterIndex];
AnsiString PrinterPortName = PrinterPortNameList->Strings[PrinterIndex];
BufferLength = DeviceCapabilities(PrinterName.c_str(),
PrinterPortName.c_str(), DC_MAXEXTENT, Buffer, NULL);
if (BufferLength == (DWORD)-1) // <<<< THIS IS WHERE ITS FAILING /
return false;
Width = LOWORD(BufferLength);
Height = HIWORD(BufferLength);
return true;