C# Signature:
[DllImport("gdi32.dll")]
static extern int ExtEscape(IntPtr hdc, int nEscape, int cbInput,
string lpszInData, int cbOutput, IntPtr lpszOutData);
User-Defined Types:
None.
Notes:
None.
Tips & Tricks:
Please add some!
Sample Code:
//By Justin Alexander, aka TheLoneCabbage
static Int32 GETTECHNOLOGY = 20;
static Int32 QUERYESCSUPPORT = 8;
static Int32 POSTSCRIPT_PASSTHROUGH = 4115;
static Int32 ENCAPSULATED_POSTSCRIPT= 4116;
static Int32 POSTSCRIPT_IDENTIFY = 4117;
static Int32 POSTSCRIPT_INJECTION = 4118;
static Int32 POSTSCRIPT_DATA = 37;
static Int32 POSTSCRIPT_IGNORE = 38;
static bool PrinterSupportsPostScript(string printername)
{
ArrayList PSChecks=new ArrayList();
PSChecks.Add(POSTSCRIPT_PASSTHROUGH);
PSChecks.Add(ENCAPSULATED_POSTSCRIPT);
PSChecks.Add(POSTSCRIPT_IDENTIFY);
PSChecks.Add(POSTSCRIPT_INJECTION);
PSChecks.Add(POSTSCRIPT_DATA);
PSChecks.Add(POSTSCRIPT_IGNORE);
IntPtr hDC=IntPtr.Zero;;
IntPtr BLOB=IntPtr.Zero;
SetLastError(true);
try
{
hDC =CreateDC(null,printername,0,IntPtr.Zero);
int isz=4;
BLOB = Marshal.AllocCoTaskMem(isz);
Marshal.WriteInt32(BLOB,GETTECHNOLOGY);
int test=ExtEscape( hDC, QUERYESCSUPPORT, 4, BLOB, 0, IntPtr.Zero);
if(test==0) return false; // printer driver does not support GETTECHNOLOGY Checks.
foreach(Int32 val in PSChecks)
{
Marshal.WriteInt32(BLOB,val);
test = ExtEscape(hDC,QUERYESCSUPPORT,isz,BLOB,0, IntPtr.Zero);
if(test!=0) return true; // if any of the checks pass, return true
}
}
catch(Exception ex){Trace.WriteLine(ex);}
finally
{
if(hDC!=IntPtr.Zero) DeleteDC(hDC);
if(BLOB!=IntPtr.Zero) Marshal.Release(BLOB);
};
return false;
}
Alternative Managed API:
Do you know one? Please contribute it!
