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;

        }

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