CODEWITHSUNDEEP
winapivisual-c++gdi+
ngamc
ngamc

Reputation: 21

Visual C++ GDI+ questions: GdiplusStartup always returns 2(Invalid paramters)

I tried to tested out a simple GDI+ program but could not initialize it. The GdiplusStartup returns 2 which means "invalid parameters". In debug mode, I can see GdiplusStartupInput startInput is initialized (GdiplusVersion=1 ....etc.) so it is not the problem.

#include <windows.h>
#include "resource.h"
#include <iostream>
#include <string>
#include <sstream>
#include <gdiplus.h>

using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")

BOOL CALLBACK DialogProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
.... some code here ....
}

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    GdiplusStartupInput startInput;
    ULONG_PTR* gdiToken = 0;

    Gdiplus::Status status = Gdiplus::GdiplusStartup(gdiToken, &startInput, NULL);
    return DialogBox(hInstance, MAKEINTRESOURCE(IDD_DIALOG1), NULL, DialogProc);
}

Thanks

Upvotes: 0

Views: 1045

Answers (1)

David Heffernan
David Heffernan

Reputation: 612934

The first argument is wrong. The documentation describes it like this:

Pointer to a ULONG_PTR that receives a token.

But you are passing a null pointer. Change the code like so:

GdiplusStartupInput startInput; // use default constructor to initialize struct
ULONG_PTR gdiToken;
Gdiplus::Status status = Gdiplus::GdiplusStartup(&gdiToken, &startInput, NULL);

Upvotes: 3

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