vc设置系统默认打印机

#include "WINSPOOL.H" 
BOOL SetSystemDefaultPrinter(LPTSTR pPrinterName) 
{ 
BOOL bFlag = FALSE; 
LONG lResult = 0; 
DWORD dwNeeded = 0; 
LPTSTR pBuffer = NULL; 
HANDLE hPrinter = NULL; 
OSVERSIONINFO stOsvInfo = {0}; 
PRINTER_INFO_2* pstPrintInfo2 = NULL; 

stOsvInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO); 
GetVersionEx(&stOsvInfo); 

if(!pPrinterName) 
{ 
return FALSE; 
} 

if(stOsvInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) //Win9x 
{ 
// Open this printer so we can get information about it 
bFlag = OpenPrinter(pPrinterName, &hPrinter, NULL); 
if(!bFlag || hPrinter==NULL) 
{ 
return FALSE; 
} 

GetPrinter(hPrinter, 2, 0, 0, &dwNeeded); 
if(dwNeeded == 0) 

{ 
ClosePrinter(hPrinter); 
return FALSE; 
} 

pstPrintInfo2 = (PRINTER_INFO_2 *)GlobalAlloc(GPTR, dwNeeded); 
if(pstPrintInfo2 == NULL) 
{ 
ClosePrinter(hPrinter); 
return FALSE; 
} 

bFlag = GetPrinter(hPrinter, 2, (LPBYTE)pstPrintInfo2, dwNeeded, &dwNeeded); 
if(!bFlag) 
{ 
ClosePrinter(hPrinter); 
GlobalFree(pstPrintInfo2); 
return FALSE; 
} 

// Set default printer attribute for this printer... 
pstPrintInfo2->Attributes |= PRINTER_ATTRIBUTE_DEFAULT; 
bFlag = SetPrinter(hPrinter, 2, (LPBYTE)pstPrintInfo2, 0); 
if(!bFlag) 
{ 
ClosePrinter(hPrinter); 
GlobalFree(pstPrintInfo2); 
return FALSE; 
}