CreateSemaphore信号灯如何使用?哪位仁兄有实例

CreateSemaphore信号灯怎么使用?哪位仁兄有实例? - C++ Builder / Windows SDK/API
我想实现多线程的同步

1.如何使用信号灯实现两个任务的同步？  
2.以实例说明线程的应用及其效果？ 

其它方法也行

[解决办法]
实例1技术要点 互斥量同步的多线程示例程序:
unit1.h 和 unit1.cpp

C/C++ code

#ifndef Unit1H#define Unit1H//---------------------------------------#include "Unit2.h"#include "Unit3.h"#include <Classes.hpp>#include <Controls.hpp>#include <StdCtrls.hpp>#include <Forms.hpp>//#include <Syncobjs.hpp>//---------------------------------------class TForm1 : public TForm{__published:    // IDE-managed Components    TMemo *Memo1;    TButton *Button1;    void __fastcall FormCreate(TObject *Sender);    void __fastcall Button1Click(TObject *Sender);private:    // User declarations    TReverseThread *ReverseThread;    TDisplayThread *DisplayThread;public:        // User declarations    char LetterTable[26];    HANDLE hMutex;    __fastcall TForm1(TComponent* Owner);};//---------------------------------------extern PACKAGE TForm1 *Form1;//---------------------------------------#endif