原想做个列表框简单的程序,思路是当您点击一个盘符的按键时,列表框显示出该盘中文件
编译器:VC2010,WND 32程序
我的代码:
// 坚持不懈.cpp : 定义应用程序的入口点。
#include "stdafx.h"
#include "坚持不懈.h"
#define 文件属性 (DDL_READWRITE|DDL_READONLY|DDL_HIDDEN|DDL_SYSTEM|DDL_DIRECTORY|DDL_ARCHIVE|DDL_DRIVES)
#define MAX_LOADSTRING 100
HINSTANCE hInst; // 当前实例
TCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
TCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
int APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
MSG msg;
HACCEL hAccelTable;
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_MY, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_MY));
while (GetMessage(&msg, NULL, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;
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_MY));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCE(IDC_MY);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassEx(&wcex);
}
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,TEXT("我的程序"), WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent,i;
PAINTSTRUCT ps;
HDC hdc;
static HWND 列表框,索引框[4];
static int cxClient,cyClient,cxChar,cyChar;
static TCHAR *缓存,v[100]=TEXT("文件信息"),l[50],*button[4]={TEXT("C盘"),TEXT("D盘"),TEXT("E盘"),TEXT("F盘")};
switch (message)
{
case WM_CREATE:
列表框=CreateWindow(TEXT("listbox"),TEXT("我的程序"),WS_CHILDWINDOW|WS_VISIBLE|LBS_STANDARD,
0,0,0,0,hWnd,(HMENU)10,(HINSTANCE)GetWindowLong(hWnd,GWL_HINSTANCE),NULL);
for(i=0;i<4;i++)
索引框[i]=CreateWindow(TEXT("button"),button[i],WS_CHILD|WS_VISIBLE,0,0,0,0,
hWnd,(HMENU)i,(HINSTANCE)GetWindowLong(hWnd,GWL_HINSTANCE),NULL);
SetFocus(索引框[0]);
return 0;
case WM_SIZE:
cxClient=LOWORD(lParam);
cyClient=HIWORD(lParam);
cxChar=LOWORD(GetDialogBaseUnits());
cyChar=HIWORD(GetDialogBaseUnits());
MoveWindow(列表框,cxClient*3/8,cyClient/4,cxClient/4+15*cxChar,cyClient/2,TRUE);
for(i=0;i<4;i++)
MoveWindow(索引框[i],4*cxChar,cyClient*(i+4)/12,cxChar*20,cyClient/12,TRUE);
return 0;
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
if(LOWORD(wParam)==0&&WM_LBUTTONDOWN)
SendMessage(列表框,LB_DIR,文件属性,(LPARAM)TEXT("C:\*.*"));
if(LOWORD(wParam)==1&&WM_LBUTTONDOWN)
SendMessage(列表框,LB_DIR,文件属性,(LPARAM)TEXT("D:\*.*"));
if(LOWORD(wParam)==2&&WM_LBUTTONDOWN)
SendMessage(列表框,LB_DIR,文件属性,(LPARAM)TEXT("E:\*.*"));
if(LOWORD(wParam)==3&&WM_LBUTTONDOWN)
SendMessage(列表框,LB_DIR,文件属性,(LPARAM)TEXT("F:\*.*"));
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_PAINT:
hdc = BeginPaint(hWnd, &ps);
TextOut(hdc,2,2*cyChar,l,wsprintf(l,TEXT("文件扫描, Writted By CXW_ALEX (学武)@All Right, 2011-6-3")));
SetTextColor(hdc,RGB(255,0,0));
TextOut(hdc,cxClient*3/8+cyChar,cyClient/4+5*cyChar,v,wsprintf(v,TEXT("您的文件列表如下:")));
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
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;
}
最终运行的结果是:点击第一第二个键列表还能显示,再点就退出程序,且主窗口上也没有TextOut所要显示的内容,望各位高手指点
关于列表框和SendMessage的问题
