Wallpaper not set in c++

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This is the program to change the wallpaper..

But the wallpaper is not set

C++

#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <string.h>
#include <iostream.h>
int main(int argc, char* argv[])
{

     LPWSTR  test = L"C:\\WINDOWS\\Web\\wallpaper\\Bliss.bmp";

     //C:\Documents and Settings\All Users\Documents\My Pictures\Sample Pictures
char a[1024];

     sprintf(a,"%s","C:\\Documents and Settings\\All Users\\Documents\\My Pictures\\Sample Pictures\\Blue hills.jpg");


    int result;

    result = SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, a, SPIF_SENDCHANGE);

//    result = SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, test, SPIF_UPDATEINIFILE);

    if (result)
    {
        cout << "Wallpaper set";
    }
    else
    {
        cout << "Wallpaper not set"<<endl;
        cout << "SPI returned" << result<<endl;;
    }

    return 0;
}

Posted 1-Nov-11 20:34pm

@BangIndia

Updated 1-Nov-11 22:39pm

Andrew Brock

v2

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Andrew Brock · Answer 1 · 2011-11-01T22:48:00

"Note When the SPI_SETDESKWALLPAPER flag is used, SystemParametersInfo always returns TRUE." from MSDN[^].
There is a note about the SPI_GETDESKWALLPAPER function at the bottom of that page by Razeen2008. It basically says that the data type is WCHAR, not char.

(I have not tried this code)

C++

#include "stdafx.h"
#include <stdio.h>
#include <windows.h>
#include <string.h>
#include <iostream.h>
int main(int argc, char* argv[]) {
    WCHAR a[1024] = L"C:\\Documents and Settings\\All Users\\Documents\\My Pictures\\Sample Pictures\\Blue hills.jpg"; //This has changed to WCHAR
    SystemParametersInfo(SPI_SETDESKWALLPAPER, 0, a, SPIF_SENDCHANGE);
    //No point checking return value, it is always TRUE.
    return 0;
}