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RootKey是注册表的根键值，比如运行regedit后看到的HKEY_USERS,HKEY_LOCAL_MACHINE就是RootKey,在TRegIniFile中缺省的RootKey是HKEY_USERS.
下面的例子是TRegistry的，TRegIniFile也差不多
void __fastcall TfrmMainForm::WriteToMyRegistry(int table_count)
{
//TODO: Add your source code here
TRegistry *MyRegistry=new TRegistry;
MyRegistry->RootKey=HKEY_LOCAL_MACHINE; //改变缺省Rootkey
if(!MyRegistry->OpenKey("Software\\Microsoft\\Windows\\Current\Version\\Run",true)) //打开主键
//这样双引号里面的东西就变成了CurrentKey
{
Application->MessageBox("注册表内容无效", "读取注册表出错",MB_ICONERROR);
MyRegistry->CloseKey();
delete MyRegistry;
return;
}
MyRegistry->WriteString("myrun","c:\\sthvcd\\sthvcd.exe");
MyRegistry->CloseKey();
delete MyRegistry;
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