c++ - file writing not working after call to open file dialog

Question

after call to following function i cant write to any files i tried c++ fstream and c's fopen what's wrong please help thanks in advance i am using codeblocks mingw windows 7

string openFileDialog(HWND hwnd,char *fileFilter,char *defaultExtension)
{
    string fileName = "";
    OPENFILENAME ofn;
    char szFileName[MAX_PATH] = "";
    ZeroMemory(&ofn, sizeof(ofn));

    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.hwndOwner = hwnd;
    ofn.lpstrFilter = fileFilter;
    ofn.lpstrFile = szFileName;
    ofn.nMaxFile = MAX_PATH;
    ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
    ofn.lpstrDefExt = defaultExtension;

    if(GetOpenFileName(&ofn)) {
        fileName.assign(szFileName);
    }

    ZeroMemory(&ofn, sizeof(ofn));
    return fileName;
}

Answer 1

If you change folder in the dialog it will change the current folder for your process - try adding the OFN_NOCHANGEDIR flag.