如何改变活动桌面壁纸在c ++ [英] how to change active desktop wallpaper in c++

问题描述

hi我要写一个小程序来更改Windows 7中的壁纸

hi i want to write a little program to change the wallpaper in windows 7

我想使用下面的代码：

#include "windows.h"
#include "wininet.h"
#include "shlobj.h"
#include "wchar.h"
#include <iostream>

void  SetWallpaper(LPCWSTR file){
    CoInitializeEx(0,COINIT_APARTMENTTHREADED);
    IActiveDesktop* desktop;
    HRESULT status =       CoCreateInstance(CLSID_ActiveDesktop,NULL,CLSCTX_INPROC_SERVER,IID_IActiveDesktop,(void**)&desktop);
    WALLPAPEROPT wOption;
    ZeroMemory(&wOption, sizeof(WALLPAPEROPT));
    wOption.dwSize=sizeof(WALLPAPEROPT);
    wOption.dwStyle = WPSTYLE_CENTER;
    status = desktop->SetWallpaper(file,0);
    wcout << status << endl;
    status = desktop->SetWallpaperOptions(&wOption,0);
    wcout << status << endl;
    status = desktop->ApplyChanges(AD_APPLY_ALL);
    wcout << status << endl;
    desktop->Release();
    CoUninitialize();
}
int wmain(int argc, wchar* argv[]){
    if(argc<=1){
        wcout << "use: " << argv[0] <<" path_to_pic.bmp" <<endl;
    }else{
        wchar_t* file = argv[1];
        SetWallpaper(file);
    }
    getchar();
    return 0;
}

但是这段代码不会改变墙纸，它只给我hresult错误

but this code does not change the wallpaper, it only gives me the hresult error-code 80070002 after calling ApplyChanges.

推荐答案

请更改您的主输入功能

int main(int argc, char* argv[])

至

int wmain(int argc, wchar_t* argv[] )

$ c> wchar_t * file =（wchar_t *）argv [1]; wmar参数已在wchar_t *

No casting is necessary like wchar_t* file = (wchar_t*)argv[1]; and it will just work as your wmain arguments are already in wchar_t*

能够使用您的代码和我的修改，并更改我的电脑墙纸

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