在窗口上设计一行滚动文字

[致物软件]

程序要求：在窗口上设计一行文字,要求文字能在窗口中向左滚动显示，而且每显示一轮, 改变一次颜色和字体
目前写到能让文字从右往左滚动显示，但只能滚动一次，无法循环滚动，就无法写后续程序。
我是用一个整形变量right记录字符串末尾的x坐标，如果right等于了屏幕窗口的左端值，就让right回到屏幕窗口的右边，但是为什么循环不起来？

// 实验三.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include "resource.h"

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst;								// current instance
TCHAR szTitle[MAX_LOADSTRING];								// The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];								// The title bar text

// Foward declarations of functions included in this code module:
ATOM				MyRegisterClass(HINSTANCE hInstance);
BOOL				InitInstance(HINSTANCE, int);
LRESULT CALLBACK	WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK	About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	MSG msg;
	HACCEL hAccelTable;

	// Initialize global strings
	LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
	LoadString(hInstance, IDC_MY, szWindowClass, MAX_LOADSTRING);
	MyRegisterClass(hInstance);

	// Perform application initialization:
	if (!InitInstance (hInstance, nCmdShow)) 
	{
		return FALSE;
	}

	hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_MY);

	// Main message loop:
	while (GetMessage(&msg, NULL, 0, 0)) 
	{
		if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) 
		{
			TranslateMessage(&msg);
			DispatchMessage(&msg);
		}
	}

	return msg.wParam;
}



//
//  FUNCTION: MyRegisterClass()
//
//  PURPOSE: Registers the window class.
//
//  COMMENTS:
//
//    This function and its usage is only necessary if you want this code
//    to be compatible with Win32 systems prior to the 'RegisterClassEx'
//    function that was added to Windows 95. It is important to call this function
//    so that the application will get 'well formed' small icons associated
//    with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
	WNDCLASSEX wcex;

	wcex.cbSize = sizeof(WNDCLASSEX); 

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

	return RegisterClassEx(&wcex);
}

//
//   FUNCTION: InitInstance(HANDLE, int)
//
//   PURPOSE: Saves instance handle and creates main window
//
//   COMMENTS:
//
//        In this function, we save the instance handle in a global variable and
//        create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
   HWND hWnd;

   hInst = hInstance; // Store instance handle in our global variable

   hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
      CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

   if (!hWnd)
   {
      return FALSE;
   }

   ShowWindow(hWnd, nCmdShow);
   UpdateWindow(hWnd);

   return TRUE;
}

//
//  FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
//  PURPOSE:  Processes messages for the main window.
//
//  WM_COMMAND	- process the application menu
//  WM_PAINT	- Paint the main window
//  WM_DESTROY	- post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	/*编写程序: 在窗口上设计一行文字,
				要求文字能在窗口中向左滚动显示,
				而且每显示一轮, 改变一次颜色和字体.*/
	static int right,
			i	= 1;
	int wmId, wmEvent,
		length; //字符串字节数
	PAINTSTRUCT ps;
	HDC hdc;
	TEXTMETRIC tm;
	LPSTR lpsz	= "Visual C++面向对象与可视化程序设计";
	length	= _tcslen(lpsz);
	switch (message) 
	{
		case WM_CREATE:
			SetTimer(hWnd,9,100,NULL);
			break;
		case WM_TIMER:
			InvalidateRect(hWnd,NULL,true);
			i++;
			break;
		case WM_COMMAND:
			wmId    = LOWORD(wParam); 
			wmEvent = HIWORD(wParam); 
			// Parse the menu selections:
			switch (wmId)
			{
				case IDM_ABOUT:
				   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
				   break;
				case IDM_EXIT:
				   DestroyWindow(hWnd);
				   break;
				default:
				   return DefWindowProc(hWnd, message, wParam, lParam);
			}
			break;
		case WM_PAINT:
			hdc = BeginPaint(hWnd, &ps);
			// TODO: Add any drawing code here...
			RECT rt;
			GetClientRect(hWnd, &rt);
			GetTextMetrics(hdc,&tm);
			right	= rt.right-10*i;
			if(right==rt.left){
				right	= rt.right;
				i	= 0;
			}
			TextOut(hdc,right-tm.tmAveCharWidth*length,rt.bottom/2,lpsz,length);
			EndPaint(hWnd, &ps);
			break;
		case WM_DESTROY:
			KillTimer(hWnd,9);
			PostQuitMessage(0);
			break;
		default:
			return DefWindowProc(hWnd, message, wParam, lParam);
   }
   return 0;
}

// Mesage handler for about box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
		case WM_INITDIALOG:
				return TRUE;

		case WM_COMMAND:
			if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) 
			{
				EndDialog(hDlg, LOWORD(wParam));
				return TRUE;
			}
			break;
	}
    return FALSE;
}

[ningto.com]

正好前段时间找了个滚动文字的，很好使，楼主研究下吧 http://download.csdn.net/detail/aidy22/1588643

[致物软件]

有没有SDK实现的，我这个是win32 Application程序

[致物软件]

引用 3 楼 movsd 的回复:

right    = rt.right-10*i;
if(right==rt.left){
    right    = rt.right;
    i    = 0;
}

由于i乘了10，所以right不一定能刚好与rt.left相等，比如rt.right=100， rt.left=15，应该改成小于等于

嗯嗯，我改成了小于，问题已经解决了

[movsd]

right    = rt.right-10*i;
if(right==rt.left){
    right    = rt.right;
    i    = 0;
}

由于i乘了10，所以right不一定能刚好与rt.left相等，比如rt.right=100， rt.left=15，应该改成小于等于

[张不]

你的那个resourse.h头文件写的是些什么东西呢