CreateEnvironmentBlock函数？？？？？

Question

《windows系统编程》中介绍了 CreateEnvironmentBlock 函数，来创建进程环境块。这个函数在哪定义的啊？怎么我在程序中调用会出错啊？在MSDN中也查不到，难道是在windows某个Dll中定义的吗？请高手解答一下。谢谢

Answer 1

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/policy/policy/createenvironmentblock.asp

Answer 2

我下面的调用为什么会出错呢？？？？ LPVOID pPEB;
HMODULE hModule = LoadLibrary( "userenv.dll" );
typedef BOOL (* FUNC)( LPVOID*, HANDLE, BOOL) ;
typedef BOOL (* FUNC1)( LPVOID ); FUNC CreateEnvironmentBlock;
FUNC1 DestroyEnvironmentBlock; if ( hModule )
{
CreateEnvironmentBlock = ( FUNC ) GetProcAddress( hModule, "CreateEnvironmentBlock" );
DestroyEnvironmentBlock = ( FUNC1) GetProcAddress( hModule, "DestroyEnvironmentBlock" );
}

if ( CreateEnvironmentBlock && DestroyEnvironmentBlock)
{
printf("OK\n"); }
CreateEnvironmentBlock( &pPEB, NULL, TRUE); 

DestroyEnvironmentBlock( pPEB ); FreeLibrary( hModule );