关于子窗口不刷新的问题，在线等

[qsfool1987]

#include <windows.h>  
#include <GL/Glut.h>  
#include "resource.h"

 

HWND hpaintwnd = NULL;
HWND hcontrolwnd = NULL;
HWND hwnd = NULL; //主窗口句柄
HINSTANCE hInst;
static char lpszClassName[] = "MainWnd"; //窗口类名  
static char lpszPaintClassName[] = "PaintWnd"; //绘制窗口类名  
static char lpszControlClassName[] = "ControlWnd"; //控制窗口类名

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); //窗口函数说明  
LRESULT CALLBACK WndPaintProc(HWND, UINT, WPARAM, LPARAM); //窗口函数说明 
LRESULT CALLBACK WndControlProc(HWND, UINT, WPARAM, LPARAM); //窗口函数说明 


int APIENTRY WinMain(HINSTANCE hInstance, //WinMain函数说明  
	HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
	/*
	建议采用Pascal的变量定义风格，即在程序（函数）开始处定义所有变量
	虽然C++的变量定义比较灵活，本程序为了使程序易于理解,未采用这种方法
	*/
	//char lpszClassName[] = "MainWnd"; //窗口类名  
	char lpszTitle[] = "Win32窗口示例"; //窗口标题名  

	WNDCLASS wndclass,paintclass,controlclass;
	HMENU hmenu = LoadMenu(hInstance, MAKEINTRESOURCE(IDR_MENU1));

	wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; //窗口类型为缺省类型  
	wndclass.lpfnWndProc = WndProc; //窗口处理函数为WndProc  
	wndclass.cbClsExtra = 0; //窗口类无扩展  
	wndclass.cbWndExtra = 0; //窗口实例无扩展  
	wndclass.hInstance = hInstance; //当前实例句柄  
	wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); //使用缺省图标  
	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); //窗口采用箭头光标  
	wndclass.hbrBackground = NULL; //窗口背景为白色  
	wndclass.lpszMenuName = NULL; //窗口中无菜单  
	wndclass.lpszClassName = lpszClassName; //窗口类名为'窗口实例' 
	hInst = hInstance;

	paintclass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; //窗口类型为缺省类型  
	paintclass.lpfnWndProc = WndPaintProc; //窗口处理函数为WndProc  
	paintclass.cbClsExtra = 0; //窗口类无扩展  
	paintclass.cbWndExtra = 0; //窗口实例无扩展  
	paintclass.hInstance = hInstance; //当前实例句柄  
	paintclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); //使用缺省图标  
	paintclass.hCursor = LoadCursor(NULL, IDC_ARROW); //窗口采用箭头光标  
	paintclass.hbrBackground = NULL; //窗口背景为白色  
	paintclass.lpszMenuName = NULL; //窗口中无菜单  
	paintclass.lpszClassName = lpszPaintClassName; //窗口类名为'窗口实例' 

	controlclass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC; //窗口类型为缺省类型  
	controlclass.lpfnWndProc = WndControlProc; //窗口处理函数为WndProc  
	controlclass.cbClsExtra = 0; //窗口类无扩展  
	controlclass.cbWndExtra = 0; //窗口实例无扩展  
	controlclass.hInstance = hInstance; //当前实例句柄  
	controlclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); //使用缺省图标  
	controlclass.hCursor = LoadCursor(NULL, IDC_ARROW); //窗口采用箭头光标  
	controlclass.hbrBackground = NULL; //窗口背景为白色  
	controlclass.lpszMenuName = NULL; //窗口中无菜单  
	controlclass.lpszClassName = lpszControlClassName; //窗口类名为'窗口实例' 


	if (!RegisterClass(&wndclass)) //注册窗口，若失败，则发出声音  
	{
		MessageBeep(0);
		return FALSE;
	}
	if (!RegisterClass(&paintclass)) //注册窗口，若失败，则发出声音  
	{
		MessageBeep(0);
		return FALSE;
	}
	if (!RegisterClass(&controlclass)) //注册窗口，若失败，则发出声音  
	{
		MessageBeep(0);
		return FALSE;
	}

	//创建窗口操作  
	hwnd = CreateWindow(lpszClassName, //创建窗口，窗口类名  
		lpszTitle, //窗口实例的标题名  
		WS_OVERLAPPEDWINDOW, //窗口的风格  
		100,
		50, //窗口左上角坐标为缺省值  
		800,
		600, //窗口的高度和宽度为缺省值  
		NULL, //此窗口无父窗口  
		hmenu, //此窗口无主菜单  
		hInstance, //应用程序当前句柄  
		NULL); //不使用该值  

	ShowWindow(hwnd, nCmdShow); //显示窗口  
	UpdateWindow(hwnd); //绘制用户区  
	// int InitGL(GLvoid);  
	MSG msg; //消息结构  
	while (GetMessage(&msg, NULL, 0, 0)) //消息循环  
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam; //程序终止时，将信息返回操作系统  
}
void SetupPixelFormat(HDC hDC) //为设备环境设置像素格式  
{
	int nPixelFormat; //像素格式变量  
	static PIXELFORMATDESCRIPTOR pfd = { sizeof(PIXELFORMATDESCRIPTOR), //数据结构大小  
		1, //版本号，总设为1  
		PFD_DRAW_TO_WINDOW | //支持窗口  
		PFD_SUPPORT_OPENGL | //支持OpenGL  
		PFD_DOUBLEBUFFER, //支持双缓存  
		PFD_TYPE_RGBA, //RGBA颜色模式  
		32, //32位颜色模式  
		0, 0, 0, 0, 0, 0, //忽略颜色为，不使用  
		0, //无alpha缓存  
		0, //忽略偏移位  
		0, //无累积缓存  
		0, 0, 0, 0, //忽略累积位  
		16, //16位z-buffer（z缓存）大小  
		0, //无模板缓存  
		0, //无辅助缓存  
		PFD_MAIN_PLANE, //主绘制平面  
		0, //保留的数据项  
		0, 0, 0 }; //忽略层面掩模  
	//选择最匹配的像素格式，返回索引值  
	nPixelFormat = ChoosePixelFormat(hDC, &pfd);
	//设置环境设备的像素格式  
	SetPixelFormat(hDC, nPixelFormat, &pfd);
}
int InitGL(GLvoid)                           // 此处开始对OpenGL进行所有设置  
{
	glShadeModel(GL_SMOOTH);                 // 启用阴影平滑  
	glClearColor(1.0f, 0.0f, 0.0f, 0.0f);    // 黑色背景  
	glClearDepth(1.0f);                      // 设置深度缓存  
	glEnable(GL_DEPTH_TEST);                 // 启用深度测试  
	glDepthFunc(GL_LEQUAL);                  // 所作深度测试的类型  
	glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);// 告诉系统对透视进行修正  
	return TRUE;                             // 初始化 OK  
}
void ChangeSize(int width, int height)
{
	glViewport(0, 0, width, height);         // 重置当前的视口glMatrixMode(GL_PROJECTION);  
	glMatrixMode(GL_PROJECTION);             // 选择投影矩阵  
	glLoadIdentity();                        // 重置投影矩阵  
	// 设置投影模式为透视投影  
	gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f);
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
}
void RenderScene()
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //清屏和清除深度缓冲区  
	glLoadIdentity();        // 重置当前的模型观察矩阵  
	glTranslatef(-1.5f, 0.0f, -26.0f);       // 左移 1.5 单位，并移入屏幕 6.0  

	glBegin(GL_TRIANGLES);        // 绘制三角形  
	glVertex3f(0.0f, 1.0f, 0.0f);      // 上顶点  
	glVertex3f(-1.0f, -1.0f, 0.0f);      // 左下  
	glVertex3f(1.0f, -1.0f, 0.0f);      // 右下  
	glEnd();         // 三角形绘制结束  
	glTranslatef(3.0f, 0.0f, 0.0f);       // 右移3单位  
	glRotatef(45, 1, 1, 0);
	glutWireCube(2);
	//此处添加绘图命令  
	//glutSwapBuffers();  
	// glFlush();  
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
	static HGLRC hRC; //绘制环境  
	static HDC hDC; //设备环境 
	PAINTSTRUCT ps;

	DWORD width, height;
	width = LOWORD(lParam);
	height = HIWORD(lParam);

	switch (message) {
	case WM_CREATE: {
		//创建子窗口
						hpaintwnd = CreateWindowEx(WS_EX_CLIENTEDGE,
							lpszPaintClassName, NULL,
							WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | ES_MULTILINE,
							0, 0, 0, 0, hwnd, 0, hInst, 0
							);
						int err = GetLastError();
						hcontrolwnd = CreateWindowEx(WS_EX_CLIENTEDGE,
							lpszControlClassName, NULL,
							WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | ES_MULTILINE,
							0, 0, 0, 0, hwnd, 0, hInst, 0
							);
						err = GetLastError();
		return 0;
	}
		break;
	case WM_COMMAND:
	{
		// 取出资源Id值  
		// 并判断用户选择了哪个菜单项  
		switch (LOWORD(wParam))
		{
		case IDR_MENU1:
			MessageBox(hwnd, "灰机来了。", "提示", MB_OK);
			break;
		
		default:
			break;
		}
	}
		break;
	case WM_DESTROY:
	{
					   //          KillTimer(hwnd, 101);  
					   
					   PostQuitMessage(0); //调用该函数发出WM_QUIT消息  
	}
		break;
	case WM_SIZE:
	{
					
					MoveWindow(hpaintwnd, 0, 0, 4 * width / 5, height, true);
					int err = GetLastError();
					MoveWindow(hcontrolwnd, 4 * width / 5 , 0, width / 5, height, true);
					
	}
		break;
		//  case WM_TIMER:  
		//      {  
		//          //IdleFunction();  
		//          InvalidateRect(hwnd, NULL, FALSE);  
		//      }  
		//      break;  
	case WM_PAINT:
	{
					 ValidateRect(hwnd, NULL);
	}
		break;
		// case  
	default: //缺省消息处理函数  
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}

//为毛该窗口不刷新？？？
LRESULT CALLBACK WndPaintProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static HGLRC hRC; //绘制环境  
	static HDC hDC; //设备环境 
	PAINTSTRUCT ps;
	switch (message) {
	case WM_CREATE:
	{
					  hDC = GetDC(hwnd); //得到当前窗口的设备环境  
					  SetupPixelFormat(hDC); //调用像素格式设置函数  
					  hRC = wglCreateContext(hDC); //创建OpenGL绘图环境并创建一个指向OpenGL绘制环境的句柄  
					  wglMakeCurrent(hDC, hRC); //将传递过来的绘制环境设置为OpenGL将要进行绘制的当前绘制环境  
					  // SetTimer(hwnd, 33, 1, NULL);  
					  InitGL();
	}
		break;
	case WM_DESTROY:
	{
					
					   wglMakeCurrent(hDC, NULL);
					   wglDeleteContext(hRC);
					   PostQuitMessage(0); //调用该函数发出WM_QUIT消息  
	}
		break;
	case WM_SIZE:
	{
					ChangeSize(LOWORD(lParam), HIWORD(lParam));
	}
		break;
	case WM_PAINT:
	{
					 hDC = BeginPaint(hwnd, &ps);
					 EndPaint(hwnd, &ps);
					 RenderScene();
					 SwapBuffers(hDC);
					 ValidateRect(hwnd, NULL);

	}
		break;
	default:
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}

LRESULT CALLBACK WndControlProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	HDC hDC;
	PAINTSTRUCT ps;
	switch (message) {
	case WM_DESTROY:
	{

					   PostQuitMessage(0); //调用该函数发出WM_QUIT消息  
	}
		break;
	case WM_PAINT:
	{
					 /*RECT rect;
					 GetClientRect(hwnd, &rect);
					 hDC = BeginPaint(hwnd, &ps);
					 char word[] = "helloworld";
					 TextOut(hDC, 10, 10, word, ARRAYSIZE(word));
					 EndPaint(hwnd, &ps);
					 int err = GetLastError();*/
					 ValidateRect(hwnd, NULL);

	}
		break;
	default: //缺省消息处理函数  
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}

问题描述：在主窗口创建了两个子窗口，为什么右边那个窗口不刷新啊

[mrlgy]

hDC = BeginPaint(hwnd, &ps); RenderScene(); SwapBuffers(hDC); EndPaint(hwnd, &ps);