自动更改桌面背景 c/c++ win32

最新推荐文章于 2023-06-13 09:18:21 发布

原创最新推荐文章于 2023-06-13 09:18:21 发布 · 6.9k 阅读

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#parameters #null #byte #image #string #path

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本文介绍了一个使用C++编写的程序，该程序能够定时更换Windows桌面背景。程序通过命令行接收目录路径和间隔时间作为参数，利用Windows API进行桌面背景设置，并保存配置信息到注册表。

这个程序仅供编程参考

若想在平时用，请下载微软的wallpaper changer

我这个程序实现了定时更换桌面背景的功能

命令行 wallpaper "your images' directory path" time_in_minute

编程要点

findfirstfile findnextfile 查找图像文件

SystemParametersInfo 修改系统信息，在这儿当然是桌面背景

注册表操作保存信息

如果做得实用，应加入开机启动功能，自然还要gui

//wallpaper.c //by onezeros@yahoo.cn||Zhijie Lee //usage:wallpaper "full directory path" interval // interval is in minutes #include <windows.h> #include <iostream> #include <string> using namespace std; int main(int argc, char* argv[]) { /* argc=3; argv[1]="E://picture//testbmp"; argv[2]="1"; */ LPCSTR currentDir; LPCSTR currentImage; int interval; HKEY hKey; WIN32_FIND_DATAA FileData; HANDLE hFind; //initialize parameters if(argc==1){ //find parameters in registry if(RegOpenKeyA(HKEY_LOCAL_MACHINE,(LPCSTR)"Software//wallpaper", &hKey)!=ERROR_SUCCESS|| RegQueryValueExA(hKey,(LPCSTR)"interval",0,NULL, (LPBYTE)interval,NULL)!=ERROR_SUCCESS|| RegQueryValueExA(hKey,(LPCSTR)"directory",0,NULL, (LPBYTE)currentDir,NULL)!=ERROR_SUCCESS|| RegQueryValueExA(hKey,(LPCSTR)"image",0,NULL, (LPBYTE)currentImage,NULL)!=ERROR_SUCCESS){ //if connot be found ,wrong usage cout<<"wrong usage"<<endl <<"Please use it like this"<<endl <<"wallpaper /"D://Files//Images/" 30"<<endl <<"30 is the interval in minutes or"<<endl <<"wallpaper /"D://Files//Images/""<<endl <<"with 30 minutes as default interval"<<endl; exit(1); }else{ hFind=FindFirstFileA(currentImage,&FileData); if(hFind==INVALID_HANDLE_VALUE){ cout<<"connot open file"; exit(1); } } }else if(argc==3){ interval=60000*atoi(argv[2]); currentDir=(LPCSTR)argv[1]; SetCurrentDirectoryA(currentDir); hFind = FindFirstFileA((LPCSTR)"*.jpg",&FileData); //hFind = FindFirstFileA((LPCSTR)"228973.jpg",&FileData); if (hFind == INVALID_HANDLE_VALUE) { cout<<"Invalid directory.Last Error reports "<<endl; exit(1); } else { currentImage=FileData.cFileName; //register the directory RegCreateKeyA(HKEY_LOCAL_MACHINE,(LPCSTR)"Software//wallpaper",&hKey); RegSetValueExA(hKey,(LPCSTR)"directory",0,REG_SZ, (CONST BYTE*)currentDir,strlen((const char*)currentDir)); RegSetValueExA(hKey,(LPCSTR)"image",0,REG_SZ, (CONST BYTE*)currentImage,strlen((const char*)currentImage)); RegSetValueExA(hKey,(LPCSTR)"interval",0,REG_DWORD, (CONST BYTE*)&interval,4); } }else{//wrong parameters cout<<"wrong parameters"<<endl; exit(1); } //circle and wait while(1){ //set wallpaper bool b=false; string fullpath((char*)currentDir); fullpath+=string("//"); fullpath+=string((char*)currentImage); b=SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0,(PVOID)fullpath.c_str(),SPIF_UPDATEINIFILE+SPIF_SENDWININICHANGE); if(b==false){ cout<<"failed to call /"SystemParametersInfoA/" "; exit(1); } Sleep(interval); if (!FindNextFileA(hFind, &FileData)){ if (GetLastError() == ERROR_NO_MORE_FILES){ hFind = FindFirstFileA((LPCSTR)"*.jpg",&FileData); }else{ printf("Couldn't find next file."); exit(1); } } currentImage=FileData.cFileName; //register the currentfile RegSetValueExA(hKey,(LPCSTR)"image",0,REG_SZ, (CONST BYTE*)currentImage,strlen((const char*)currentImage)); } //FindClose(hFind); //RegCloseKey(hKey); return 0; }