Question

I am trying to call GetFileInformationByHandle on the executable of my own running program. This means I’ll need to get a file handle to the .exe that started my program. Is there any way to do this?

Failing that, is there any way to get the nFileIndexHigh and nFileIndexLow for a running executable?

Answer 1

Here it is a way to do this. I hope this helps:

#include <Windows.h>
#include <iostream>
using namespace std;

//declare a BY_HANDLE_FILE_INFORMATION structure
BY_HANDLE_FILE_INFORMATION fileinfo;

int main()
{
    // clear everything in the structure, this is optional
    ZeroMemory(&fileinfo, sizeof(BY_HANDLE_FILE_INFORMATION));

    // obtain a handle to the file, in this case the file
    // must be in the same directory as your application
    HANDLE myfile = NULL;
    myfile = CreateFileA("example.exe",0x00,0x00,NULL,
                         OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);

    // if we managed to obtain the desired handle
    if(myfile!=INVALID_HANDLE_VALUE)
    {
        //try to fill the structure with info regarding the file
        if(GetFileInformationByHandle(myfile, &fileinfo))
        {
            // Ex: show the serial number of the volume the file belongs to
            cout << endl << hex << fileinfo.dwVolumeSerialNumber << endl;
        }
        // you should close the handle once finished
        CloseHandle(myfile);
    }
    system("pause");
    return 0;
}