一般情况下多线程编程多采用MFC类库实现

一般情况下多线程编程多采用MFC类库实现，那么如果不使用MFC 如何进行多线程程序设计呢？本文将就这个问题进行讨论：微软在Windows API中提供了建立新的线程的函数CreateThread，它的语法如下：hThread = CreateThread (&security_attributes, dwStackSize, ThreadProc,pParam, d wFlags, &idThread) ;第一个参数是指向SECURITY_ATTRIBUTES型态的结构的指针。

在Windows 98中忽略该参数。

在Windows NT中，它被设为NULL。

第二个参数是用于新线程的初始堆栈大小，默认值为0。

在任何情况下，Windows根据需要动态延长堆栈的大小。

CreateThread的第三个参数是指向线程函数的指标。

函数名称没有限制，但是必须以下列形式声明：DWORD WINAPI ThreadProc (PVOID pParam) ;CreateThread的第四个参数为传递给ThreadProc的参数。

这样主线程和从属线程就可以共享数据。

CreateThread的第五个参数通常为0，但当建立的线程不马上执行时为旗标CREATE_SU SPENDED。

线程将暂停直到呼叫ResumeThread来恢复线程的执行为止。

第六个参数是一个指标，指向接受执行绪ID值的变量。

大多数Windows程序写作者喜欢用在PROCESS.H表头文件中声明的C执行时期链接库函数_beginthread。

它的语法如下：hThread = _beginthread (ThreadProc, uiStackSize, pParam) ;它更简单，对于大多数应用程序很完美，这个线程函数的语法为：void __cdecl ThreadProc (void * pParam) ;在建立多线程的Windows程序时，需要在「Project Settings」对话框中做一些修改。

选择「C/C++」页面标签，然后在「Category」下拉式清单方块中选择「Code Generation」。

在「Use Run-Time Library」下拉式清单方块中，可以看到用于「Release」设定的「Sing le-Threaded」和用于Debug设定的「Debug Single-Threaded」。

将这些分别改为「Multit hreaded」和「Debug Multithreaded」。

这将把编译器旗标改为/MT，它是编译器在编译多线程的应用程序所需要的。

第一个demo./********************************************************* deom1---四个线程同时写一个文件( 没有参数 )*************************************************************/ #include <windows.h>#include <process.h> /* _beginthread, _endthread */#include <iostream>#include <fstream>using namespace std;ofstream out("out.txt");void ThreadFunc1(PVOID param){while(1){Sleep(10);out<<"This was draw by thread l"<<endl;}}void ThreadFunc2(PVOID param){while(1){Sleep(10);out<<"This was draw by thread 2"<<endl;}}void ThreadFunc3(PVOID param){while(1){Sleep(10);out<<"This was draw by thread 3"<<endl;}}void ThreadFunc4(PVOID param){while(1){Sleep(10);out<<"This was draw by thread 4"<<endl;}}int main(){int i=0;_beginthread(ThreadFunc1,0,NULL);_beginthread(ThreadFunc2,0,NULL);_beginthread(ThreadFunc3,0,NULL);_beginthread(ThreadFunc4,0,NULL);Sleep(3000);out<<"end";return 0;}//demo1 end-----------------------------------------------第二个demo./********************************************************* deom2---四个线程同时写一个文件( 有参数 )*************************************************************/ #include <windows.h>#include <process.h> /* _beginthread, _endthread */#include <iostream>#include <fstream>#include <string>using namespace std;ofstream out("out.txt");void ThreadFunc1(PVOID param){while(1){char *p;p=(char *) param;Sleep(10);out<<p<<"This was draw by thread l"<<endl; }}void ThreadFunc2(PVOID param){while(1){Sleep(10);out<<"This was draw by thread 2"<<endl;}}void ThreadFunc3(PVOID param){while(1){Sleep(10);out<<"This was draw by thread 3"<<endl;}}void ThreadFunc4(PVOID param){while(1){Sleep(10);out<<"This was draw by thread 4"<<endl;}}int main(){char *pstr=" 参数传递成功";_beginthread(ThreadFunc1,0,pstr);_beginthread(ThreadFunc2,0,NULL);_beginthread(ThreadFunc3,0,NULL);_beginthread(ThreadFunc4,0,NULL);Sleep(1000);out<<"end";return 0;}// demo2 end ------------------------------------------------第三个demo( 一个win32 应用程序 )/********************************************************* deom3--- 在屏幕上随机画出一系列矩形*************************************************************/#include <windows.h>#include <process.h>LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;HWND hwnd ;int cxClient, cyClient ;int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow){static TCHAR szAppName[] = TEXT ("RndRctMT") ;MSG msg ;WNDCLASS wndclass ;wndclass.style = CS_HREDRAW | CS_VREDRAW ;wndclass.lpfnWndProc = WndProc ;wndclass.cbClsExtra = 0 ;wndclass.cbWndExtra = 0 ;wndclass.hInstance = hInstance ;wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;wndclass.lpszMenuName = NULL ;wndclass.lpszClassName = szAppName ;if (!RegisterClass (&wndclass)){MessageBox (NULL, TEXT ("This program requires Windows NT!"),szAppName, MB_IC ONERROR) ;return 0 ;}hwnd = CreateWindow ( szAppName, TEXT ("Random Rectangles"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, CW_USEDEFAULT,CW_USEDEFAULT, CW_USEDEFAULT,NULL, NULL, hInstance, NULL) ;ShowWindow (hwnd, iCmdShow) ;UpdateWindow (hwnd) ;while (GetMessage (&msg, NULL, 0, 0)){TranslateMessage (&msg) ;DispatchMessage (&msg) ;}return msg.wParam ;}VOID Thread (PVOID pvoid){HBRUSH hBrush ;HDC hdc ;int xLeft, xRight, yTop, yBottom, iRed, iGreen, iBlue ;while (TRUE){if (cxClient != 0 || cyClient != 0){xLeft = rand () % cxClient ;xRight = rand () % cxClient ;yTop = rand () % cyClient ;yBottom = rand () % cyClient ;iRed = rand () & 255 ;iGreen = rand () & 255 ;iBlue = rand () & 255 ;hdc = GetDC (hwnd) ;hBrush = CreateSolidBrush (RGB (iRed, iGreen, iBlue)) ;SelectObject (hdc, hBrush) ;Rectangle (hdc,min (xLeft, xRight), min (yTop, yBottom),max (xLeft, xRight), max (yTop, yBottom)) ;ReleaseDC (hwnd, hdc) ;DeleteObject (hBrush) ;}}}LRESULT CALLBACK WndProc ( HWND hwnd, UINT message, WPARAM wParam, LPARAM lPara m){switch (message){case WM_CREATE:_beginthread (Thread, 0, NULL) ;return 0 ;case WM_SIZE:cxClient = LOWORD (lParam) ;cyClient = HIWORD (lParam) ;return 0 ;case WM_DESTROY:PostQuitMessage (0) ;return 0 ;}return DefWindowProc (hwnd, message, wParam, lParam) ; }//demo4 end-----------------------------------------------。