qiu

// lesson2.cpp : 定义应用程序的入口点。
//

#include "stdafx.h"
#include "lesson2.h"

#define MAX_LOADSTRING 100
#define ID_TEXT1 1
#define ID_BUTTOM 4
// 全局变量:
HINSTANCE hInst; // 当前实例
TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
TCHAR szChildTextClassName[]=TEXT("TextClass");
TCHAR szTextX[9]=TEXT("X:");
TCHAR szTextY[9]=TEXT("Y:");
static HWND hWndText1;
// 此代码模块中包含的函数的前向声明:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK ChildText(HWND,UINT,WPARAM,LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
HWND hbtnWnd;
int APIENTRY _tWinMain(HINSTANCE hInstance,
  HINSTANCE hPrevInstance,
  LPTSTR lpCmdLine,
  int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);

  // TODO: 在此放置代码。
MSG msg;
HACCEL hAccelTable;

// 初始化全局字符串
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_LESSON2, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);

// 执行应用程序初始化:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}

hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_LESSON2));

// 主消息循环:
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}

return (int) msg.wParam;
}



//
// 函数: MyRegisterClass()
//
// 目的: 注册窗口类。
//
// 注释:
//
// 仅当希望
// 此代码与添加到 Windows 95 中的“RegisterClassEx”
// 函数之前的 Win32 系统兼容时，才需要此函数及其用法。调用此函数十分重要，
// 这样应用程序就可以获得关联的
// “格式正确的”小图标。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
WNDCLASSEX wndclass;
wcex.cbSize = sizeof(WNDCLASSEX);

wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_LESSON2));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCE(IDC_LESSON2);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

return RegisterClassEx(&wcex);


wndclass.cbSize = sizeof(WNDCLASSEX);
wndclass.style=CS_HREDRAW|CS_VREDRAW|WS_VISIBLE;
wndclass.lpfnWndProc=ChildText;
wndclass.cbClsExtra=sizeof(long);
wndclass.cbWndExtra=sizeof(long);
wndclass.hInstance = hInstance;
wndclass.hIcon=NULL;
wndclass.hCursor=LoadCursor(NULL,IDC_CROSS);
wndclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wndclass.lpszClassName=szChildTextClassName;
wndclass.lpszMenuName = NULL;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassEx(&wndclass);
}

//
// 函数: InitInstance(HINSTANCE, int)
//
// 目的: 保存实例句柄并创建主窗口
//
// 注释:
//
// 在此函数中，我们在全局变量中保存实例句柄并
// 创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
  HWND hWnd;
  hInst = hInstance; // 将实例句柄存储在全局变量中

  hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
  CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
  if (!hWnd)
  {
  return FALSE;
  }
hbtnWnd=CreateWindow(TEXT("button"),TEXT("狂飙"),BS_PUSHBUTTON|WS_CHILD|WS_VISIBLE,600,20,40,40,hWnd,(HMENU)ID_BUTTOM
,(HINSTANCE)GetWindowLong(hWnd,GWL_HINSTANCE),NULL);
   
   
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
hWndText1=CreateWindow(szChildTextClassName,NULL,WS_CHILD|WS_VISIBLE|WS_CAPTION,300,400,500,500,hWnd,(HMENU)ID_TEXT1
,(HINSTANCE)GetWindowLong(hWnd,GWL_HINSTANCE),NULL);
if(!hWndText1)
{
return FALSE;
}
ShowWindow(hWndText1,SW_SHOW);
UpdateWindow(hWndText1); return TRUE;
}

//
// 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// 目的: 处理主窗口的消息。
//
// WM_COMMAND - 处理应用程序菜单
// WM_PAINT - 绘制主窗口
// WM_DESTROY - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;



switch (message)
{
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// 分析菜单选择:
switch (wmId)
{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_CREATE:
break;
case WM_SIZE:
hdc=GetDC(hWnd);
MoveWindow(hWndText1,500,400,700,600,TRUE);
ReleaseDC(hWnd,hdc);
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// TODO: 在此添加任意绘图代码...
TextOut(hdc,150,30,szTextX,lstrlen(szTextX));
TextOut(hdc,150,50,szTextY,lstrlen(szTextY));
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_MOUSEMOVE:
wsprintf(szTextX,TEXT("X:%3d\0"),LOWORD(lParam));
wsprintf(szTextY,TEXT("Y:%3d\0"),HIWORD(lParam));
hdc=GetDC(hWnd);
RECT Rect;
Rect.left=150;
Rect.top=30;
Rect.right=220;
Rect.bottom=80;
InvalidateRect(hWnd,&Rect,TRUE);
ReleaseDC(hWnd,hdc);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}

// “关于”框的消息处理程序。
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
UNREFERENCED_PARAMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return (INT_PTR)TRUE;

case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
}
LRESULT CALLBACK ChildText(HWND hWnd,UINT Message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
switch(Message)
{
case WM_PAINT:
hdc=BeginPaint(hWnd,&ps);
EndPaint(hWnd,&ps);
return 0;
}
return 0;
}

求大虾帮助，子窗口显示不了