Need some help with GetPrinterDevice

Thomas Stockbruegger
Thomas Stockbruegger used Ask the Experts™
on
Hello,
I would like to change the call to  GetPrinterDevice like this  
if (GetPrinterDevice(_T("7-PDF Printer"), &hDevNames, &hDevMode))

to a string, but this will not work
if (GetPrinterDevice (PDF_DRUCKER), &hDevNames, &hDevMode))

      
      

       CString str_PDF="7-PDF Printer";

        LPTSTR string = new TCHAR[str_PDF.GetLength()+1];
       _tcscpy(string,str_PDF);
       strcpy(PDF_DRUCKER,string);
 
       if (GetPrinterDevice (PDF_DRUCKER), &hDevNames, &hDevMode))

please let me know
500 points with a solution.
Thank you.
Best regards,
Thomas
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Zoppo
Commented:
Hi tsp2002,

is this the real code you use? I ask because what's obviously wrong is the ')' after PDF_DRUCKER.

IMO this should work: 
     CString str_PDF=_T( "7-PDF Printer" );

       if (GetPrinterDevice (str_PDF, &hDevNames, &hDevMode))

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Hope that helps,

ZOPPO
Top Expert 2016
Commented: 
 if (GetPrinterDevice (str_PDF.GetBuffer(str_PDF.GetLength()+1), &hDevNames, &hDevMode))

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should work.

CString has a built-in operator LPCTSTR which would turn the CString to a (const) pointer to TCHAR. but i assume the GetPrinterDevice uses a LPTSTR for first argument what is a non-const pointer to TCHAR. so you have to use the GetBuffer function.

Sara
Thomas Stockbruegger

Author

Commented:
thank you, that was very fast
best regards,
Thomas
Thomas Stockbruegger

Author

Commented:
This will work, and you have to use GetBuffer()

CString str_PDF=_T( "7-PDF Printer" );
if (GetPrinterDevice (str_PDF.GetBuffer(str_PDF.GetLength()+1), &hDevNames, &hDevMode))

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