How to change desktop background using VC++

Question

I am currently trying to change my desktop background using SystemParametersInfo() vs doesnt give me any errors when I type my stuff in but when I run the program I get this

Answer 1

You need to add L to the file path. L"C:/Windows/Downloaded Program Files/Flowers.jpg" .

#include "stdafx.h"
#include 

int main() {

    int return_value = SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, L"d:/flower1.jpg", SPIF_UPDATEINIFILE);

    return 0;
}