GetDefaultPrinterA undeclared(first us this function

hey all

once again i need your technical expertise.

i am using DEV-C++ 4.9.9.2

and when i compile my dll i get the following Error

GetdefaultPrinerA undeclared (first ust this function)

this is the code of my dll

Code:

---


#include "NativeWindowsPrinter.h"
#include <windows.h>
#include <stdio.h>
#include <Winspool.h>


BOOL APIENTRY DllMain (HINSTANCE hInst    /* Library instance handle. */ ,
                      DWORD reason        /* Reason this function is being called. */ ,
                      LPVOID reserved    /* Not used. */ )
{
    switch (reason)
    {
      case DLL_PROCESS_ATTACH:
        break;

      case DLL_PROCESS_DETACH:
        break;

      case DLL_THREAD_ATTACH:
        break;

      case DLL_THREAD_DETACH:
        break;
    }

    /* Returns TRUE on success, FALSE on failure */
    return TRUE;
}

JNIEXPORT jstring JNICALL Java_be_ikmo_print_NativeWindowsPrinter_ngetDefaultPrinter
  (JNIEnv * env, jobject obj)
  {
        LPTSTR  pPrinterName;
        LPDWORD pdwBufferSize;
        if(!GetDefaultPrinter(pPrinterName, pdwBufferSize))
              return env->NewStringUTF("sdfqsdfqs");
             
        return  env->NewStringUTF(pPrinterName);
}

---

can anybody help me out with this problem

thanks in advance

Did you add Winspool.lib ( might be called a little different on dev-cpp ) to the linker options ?
Kurt

no i added system32\winspool.drv
or winspool.a that was provided with dev-c++

James

You are right. It's not a linker error you have.
Are you shure the include isn't called <winspool.h> ?.
Kurt

// from winspool.h
// #if _WIN32_WINNT >= 0x0500
so:
#define _WIN32_WINNT 0x0500

before including windows.h or winspool.h

That should get you going,
Brian

p.s. that would probably have been better served in the windows programming section but we got you covered :)

ow dang, that could very well be it.
i will check this first thing in the morning

i will let you know the outcome :p

i does compile but when i execute the program freezes.
i never get the default printer returned. :(

anybody got any ideas

There's more to calling a function than just getting the types to match.

Code:

---

TCHAR szPrinterName[500];
DWORD cchPrinterName = 500;
GetDefaultPrinter(szPrinterName, &cchPrinterName);

---

shouldn't it be better to
use something like this

Code:

---

        DWORD cchPrinterName ;   
        if (!GetDefaultPrinter(NULL, &cchPrinterName))
        {
          if(::GetLastError() != ERROR_INSUFFICIENT_BUFFER)
          {
                              return env->NewStringUTF("");
          }
        }

        TCHAR szPrinterName[cchPrinterName];
        if(!GetDefaultPrinter(szPrinterName, &cchPrinterName))
                return env->NewStringUTF("");
        return  env->NewStringUTF(szPrinterName);

---

that way the buffer is always sufficient? correct me if i am wrong :o ?

James

If that's the behaviour GetDefaultPrinter offers, then the code is sound (except the C99-style array, which won't work in C++). If not ... not.