C语言注册表操作实例（转）

#include <stdio.h>
#include <windows.h>
int main(void)
{
char regname[]="Software//Microsoft//Windows//CurrentVersion//Run";
HKEY hkResult;
int ret=RegOpenKey(HKEY_LOCAL_MACHINE,regname,&hkResult);

ret=RegSetValueEx(hkResult,"hacker"/* 注册表键名*/,0,REG_EXPAND_SZ,(unsigned char *)"%systemroot%//hacker.exe",25);
if(ret==0){
printf("success to write run key/n");
RegCloseKey(hkResult);
}
else {
printf("failed to open regedit.%d/n",ret);
return 0;
}
char modlepath[256];
char syspath[256];
GetModuleFileName(0,modlepath,256);//取得程序名字
GetSystemDirectory(syspath,256);
ret=CopyFile(modlepath,strcat(syspath,"//hacker.exe"),1);
if(ret)
{
printf("%s has been copyed to sys dir %s/n",modlepath,syspath);
}
else printf("%s is exisis",modlepath);
return 0;
}