java.lang.UnsatisfiedLinkError: Error looking up function 'GetModuleFileNameEx'

Question

I am trying to import GetModuleFileNameEx in java application. The definition of the function is:

DWORD WINAPI GetModuleFileNameEx(
  _In_     HANDLE  hProcess,
  _In_opt_ HMODULE hModule,
  _Out_    LPTSTR  lpFilename,
  _In_     DWORD   nSize
);

I translated that into:

public abstract DWORD GetModuleFileNameEx(
    WinNT.HANDLE hProcess,
    WinNT.HMODULE hModule,
    char[] pathName,
    WinNT.DWORD pathNameSize
);

Which I defined in class like this:

 import com.sun.jna.Native;
 import com.sun.jna.Pointer;
 import com.sun.jna.platform.win32.Kernel32;
 import com.sun.jna.platform.win32.WinDef;
 import com.sun.jna.platform.win32.WinNT;
 import com.sun.jna.win32.W32APIOptions;


 public abstract interface Kernel32Ext
   extends Kernel32
 {
   public static final Kernel32Ext INSTANCE = (Kernel32Ext)Native.loadLibrary("kernel32.dll", Kernel32Ext.class, W32APIOptions.DEFAULT_OPTIONS);
   public abstract DWORD GetModuleFileNameEx(WinNT.HANDLE hProcess, WinNT.HMODULE hModule, char[] pathName, WinNT.DWORD pathNameSize);
 }

But when I try to call the method I get an error:

java.lang.UnsatisfiedLinkError: Error looking up function 'GetModuleFileNameEx': Uvedená procedura nebyla nalezena.

I double checked and according to posts here on stack overflow and other JNA programs, LPTSTR correctly translates to char[] in JNA API. So there must be something else that is wrong. Am I importing wrong dll, or with wrong options?

I am running this on Windows 7 x64 bit (Czech, hence the non-english error message).

Answer 1

There is no function by that name in kernel32 (or elsewhere). See the MSDN page for GetModuleFileNameEx. The function you're looking for is GetModuleFileNameExW.