File Name Path Bug - winapi

Question

I'm starting to program and I'm using Visual Studio. I have this simple program that some days ago worked, but after working with another project, it now returns me an error:
// Include file header
#include <Windows.h>
#include <iostream>
#include <sstream>
#include <string>
#include <string.h>
#include <gif_lib.h>
void SaveDialogCreation(HWND hWnd)
{
OPENFILENAMEA ofn;
char szFileName[MAX_PATH] = "";
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hWnd;
ofn.lpstrFilter = "Text Files (*.txt)\0*.txt\0All Files (*.*)\0*.*\0";
ofn.lpstrFile = szFileName;
ofn.nMaxFile = MAX_PATH;
ofn.lpstrDefExt = "txt";
ofn.Flags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
// open save dialog
if (GetSaveFileNameA(ofn))
{
gif_write(szFileName);
}
}
//gif_write code function
bool gif_write(const char *fileName)
{
// it using giflib_win library
int error;
// Open gif file
GifFileType* gifFile = EGifOpenFileName(fileName, false, &error);
// error while open gif file
if (!gifFile) {
std::cout << "EGifOpenFileName() failed - " << error << std::endl;
return false;
}
GifColorType colors[64];
GifColorType* c = colors;
int level[4] = { 0, 85, 170, 255 };
for (int r = 0; r < 4; ++r) {
for (int g = 0; g < 4; ++g) {
for (int b = 0; b < 4; ++b, ++c) {
c->Red = level[r];
c->Green = level[g];
c->Blue = level[b];
}
}
}
// Write pixel to gif
GifByteType pix[16] = {
0, 1, 2, 3, // B
0, 4, 8, 12, // G
0, 16, 32, 48, // R
0, 21, 42, 63, // BK
};
gifFile->SWidth = 4;
gifFile->SHeight = 4;
gifFile->SColorResolution = 8;
gifFile->SBackGroundColor = 0;
gifFile->SColorMap = GifMakeMapObject(64, colors);
SavedImage gifImage;
gifImage.ImageDesc.Left = 0;
gifImage.ImageDesc.Top = 0;
gifImage.ImageDesc.Width = 4;
gifImage.ImageDesc.Height = 4;
gifImage.ImageDesc.Interlace = false;
gifImage.ImageDesc.ColorMap = nullptr;
gifImage.RasterBits = (GifByteType*)malloc(16);
gifImage.ExtensionBlockCount = 0;
gifImage.ExtensionBlocks = nullptr;
memcpy(gifImage.RasterBits, pix, 16);
GifMakeSavedImage(gifFile, &gifImage);
if (EGifSpew(gifFile) == GIF_ERROR) {
std::cout << "EGifSpew() failed - " << gifFile->Error << std::endl;
EGifCloseFile(gifFile, &error);
return false;
}
// Close gif file
EGifCloseFile(gifFile, &error);
return true;
}
I can compile it, but when I use the save dialog in gif_write(), it saves the gif file but has the first character in the filename.
How can I solve this?

Answer 1

It can compile but crashed.
It's definite that there is a semantic problem with the code. A possible one is OFN_EXPLORER which Indicates that
any customizations made to the Open or Save As dialog box. By default,
the Open and Save As dialog boxes use the Explorer-style user
interface regardless of whether this flag is set. This flag is
necessary only if you provide a hook procedure or custom template,
or set the OFN_ALLOWMULTISELECT flag.
You could need the example.