学步园

采用的编译环境为VC++6.0

（一）第一个窗口函数

FirstWindow.c#include <windows.h></p> <p>LRESULT CALLBACK ProcWinMain(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)<br /> {<br /> PAINTSTRUCT stPs;<br /> RECT stRect;<br /> HDC hDc;</p> <p> switch(uMsg)<br /> {<br /> case WM_PAINT:<br /> hDc = BeginPaint(hWnd, &stPs);<br /> GetClientRect(hWnd, &stRect);<br /> DrawText(hDc, TEXT("Win32 Programing, Simple and Powerful"), -1, &stRect, DT_SINGLELINE | DT_CENTER | DT_VCENTER);<br /> EndPaint(hWnd, &stPs);<br /> return 0;</p> <p> case WM_CLOSE:<br /> DestroyWindow(hWnd);<br /> PostQuitMessage(0);<br /> return 0;<br /> }<br /> return DefWindowProc(hWnd, uMsg, wParam, lParam);<br /> }</p> <p>int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)<br /> {<br /> WNDCLASSEX stWndCls;<br /> MSG stMsg;<br /> HWND hWnd;</p> <p> RtlZeroMemory(&stWndCls, sizeof(stWndCls));<br /> stWndCls.hCursor = LoadCursor(NULL, IDC_ARROW);<br /> stWndCls.hIcon = LoadIcon(NULL, IDI_APPLICATION);<br /> stWndCls.hIconSm = LoadIcon(NULL, IDI_APPLICATION);<br /> stWndCls.cbWndExtra = 0;<br /> stWndCls.cbClsExtra = 0;<br /> stWndCls.hInstance = hInstance;<br /> stWndCls.cbSize = sizeof(WNDCLASSEX);<br /> stWndCls.style = CS_HREDRAW | CS_VREDRAW;<br /> stWndCls.lpfnWndProc = ProcWinMain;<br /> stWndCls.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);<br /> stWndCls.lpszClassName = TEXT("MyClass");<br /> stWndCls.lpszMenuName = NULL;</p> <p> RegisterClassEx(&stWndCls);</p> <p> hWnd = CreateWindowEx(WS_EX_CLIENTEDGE, TEXT("MyClass"), TEXT("My First Window"),<br /> WS_OVERLAPPEDWINDOW, 100, 100, 600, 400, NULL, NULL, hInstance, NULL);<br /> CreateWindowEx(0, TEXT("Button"), TEXT("&OK"), WS_CHILD | WS_VISIBLE, 10, 10, 65, 22, hWnd, (HMENU)1, hInstance, NULL);<br /> ShowWindow(hWnd, SW_SHOWNORMAL);<br /> UpdateWindow(hWnd);</p> <p> while(GetMessage(&stMsg, NULL, 0, 0))<br /> {<br /> TranslateMessage(&stMsg);<br /> DispatchMessage(&stMsg);<br /> }<br /> return stMsg.wParam;<br /> }

（二）窗口间的通信

//窗口间消息发送 接收程序Receive.c 代码在FirstWindow.c代码ProcWinMain函数中添加变量定义：

TCHAR buffer[512];<br /> TCHAR szFmt[]=TEXT("Received WM_SETTEXT message/nparam: %08x/ntext: %s");

//然后在处理WM_PAINT消息代码段后添加下述代码：

case WM_SETTEXT:<br /> wsprintf(buffer, szFmt, lParam, lParam); </p> <p> MessageBox(NULL, buffer, TEXT("Success!"), MB_OK | MB_ICONINFORMATION);<br /> return 0;</p> <p>

//发送函数Send.c代码：

#include <windows.h></p> <p>HWND hWnd;<br /> TCHAR szBuffer[256];</p> <p>const TCHAR szCaption[] = TEXT("SendMessage");<br /> const TCHAR szStart[] = TEXT("Press OK start SendMessage, param: %08x ");<br /> const TCHAR szReturn[] = TEXT("SendMessage returned!");<br /> const TCHAR szDestClass[] = TEXT("MyClass");<br /> const TCHAR szText[] = TEXT("Text send to other windows");<br /> const TCHAR szNotFound[] = TEXT("Receive Message Window not found");</p> <p>int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR CmdLine, int iCmdShow)<br /> {<br /> if((hWnd = FindWindow(szDestClass, NULL)) != NULL)<br /> {<br /> wsprintf(szBuffer, szStart, szText);<br /> MessageBox(NULL, szBuffer, szCaption, MB_OK);<br /> SendMessage(hWnd, WM_SETTEXT, 0, (LPARAM)szText);<br /> MessageBox(NULL, szReturn, szCaption, MB_OK);<br /> }<br /> else<br /> MessageBox(NULL, szNotFound, szCaption, MB_OK);<br /> return 0;<br /> }</p> <p>

（三）窗口间数据传递

//只要将（二）中接收代码Receive.c中case: WM_SETTEXT段替换为：

case WM_COPYDATA:<br /> wsprintf(buffer, szFmt, ((COPYDATASTRUCT *)lParam)->lpData, ((COPYDATASTRUCT *)lParam)->lpData);<br /> MessageBox(NULL, buffer, TEXT("Success!"), MB_OK | MB_ICONINFORMATION);<br /> return 0;</p> <p>

//只要将（二）中发送文件Send.c中WinMain改为：

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR CmdLine, int iCmdShow)<br /> {<br /> COPYDATASTRUCT stCDS;<br /> stCDS.cbData = sizeof(szText);<br /> stCDS.dwData = 0;<br /> stCDS.lpData = szText;<br /> if((hWnd = FindWindow(szDestClass, NULL)) != NULL)<br /> {<br /> wsprintf(szBuffer, szStart, szText);<br /> MessageBox(NULL, szBuffer, szCaption, MB_OK);<br /> //SendMessage(hWnd, WM_SETTEXT, 0, (LPARAM)szText);<br /> SendMessage(hWnd, WM_COPYDATA, 0, (LPARAM)&stCDS);<br /> MessageBox(NULL, szReturn, szCaption, MB_OK);<br /> }<br /> else<br /> MessageBox(NULL, szNotFound, szCaption, MB_OK);<br /> return 0;<br /> }