#include <windows.h>
#include <commdlg.h>
#include "resource.h"
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
PSTR szCmdLine,
int iCmdShow) {
static TCHAR szAppName[] = TEXT("openFile");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(hInstance, szAppName);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = szAppName;
wndclass.lpszClassName = szAppName;
if(!RegisterClass(&wndclass)) {
MessageBox(NULL, TEXT("Register failure..."),
szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow(szAppName,
szAppName,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
BOOL openDlg(HWND hwnd, TCHAR* fullPath, TCHAR* fileName) {
static OPENFILENAME ofn;
static TCHAR szFilter[] = TEXT("Text Files(*.txt)\0*.txt\0") \
TEXT("All Files(*.*)\0*.*\0\0");
// 确定结构的大小
ofn.lStructSize = sizeof(OPENFILENAME);
// 指定它的父窗口
ofn.hwndOwner = hwnd;
// 一般为NULL，表示我们使用的是通用对话框
// ，当然我们也可以自定义对话框，此时hInstance指示
// 资源的handle。
ofn.hInstance = NULL;
// 指示打开或者保存文件时的过滤器，比如说：
// static TCHAR szFilter[] = TEXT("Text Files(*.txt)\0*.txt\0") \
// TEXT("All Files(*.*)\0*.*\0\0");
// 结构是这样的:描述\0过滤\0, 最后一项必须是两个\0,
// 详情请参考MSDN。
ofn.lpstrFilter = szFilter;
// 一般为NULL
ofn.lpstrCustomFilter = NULL;
// 一般为0
ofn.nMaxCustFilter = 0;
// 指示默认过滤器为第几项
ofn.nFilterIndex = 0;
// 用于保存文件的完事路径及文件名
ofn.lpstrFile = fullPath;
// 指示上面结构的大小
ofn.nMaxFile = MAX_PATH;
// 用于保存文件名，不包括路径
ofn.lpstrFileTitle = fileName;
// 指示上面结构的大小
ofn.nMaxFileTitle = MAX_PATH;
// 指示打开对话框的第一路径，
// 我发现为NULL时，初始化路径总是
// “我的文档”。
ofn.lpstrInitialDir = NULL;
// 指示对话框的caption, 我们一般为NULL，
// 让系统指示， 当然也可以自己设置。
ofn.lpstrTitle = NULL;
// 这个东西在打开保存等有点不同，下面是为了打开而设置的
// 我们以后会看到保存时此项的设置。
ofn.Flags = OFN_HIDEREADONLY;
// 为0就可以了
ofn.nFileOffset = 0;
// 为0就可以了
ofn.nFileExtension = 0;
// 如果你保存的时候忘记加.txt时，
// 它会自动给你加上。
ofn.lpstrDefExt = TEXT("txt");
// 为0就可以了
ofn.lCustData = 0;
// 为NULL就可以了
ofn.lpfnHook = NULL;
// 如果想定制对话框， 下面的就不能为NULL了
// 但是我们一般为NULL。
ofn.lpTemplateName = NULL;
return GetOpenFileName(&ofn);
}
BOOL openReadFile(HWND hwnd, TCHAR* fullPath) {
HANDLE hFile;
PBYTE pBuffer;
int iFileLength;
DWORD dwByteRead;
if(INVALID_HANDLE_VALUE == (hFile = CreateFile(
fullPath, GENERIC_READ, FILE_SHARE_READ, NULL,
OPEN_EXISTING, 0, NULL)))
return FALSE;
iFileLength = GetFileSize(hFile, NULL);
pBuffer = malloc(iFileLength + 2);
ReadFile(hFile, pBuffer, iFileLength, &dwByteRead, NULL);
CloseHandle(hFile);
pBuffer[iFileLength] = pBuffer[iFileLength + 1] = '\0';
SetWindowText(hwnd, pBuffer);
free(pBuffer);
return TRUE;
}
LRESULT CALLBACK WndProc(HWND hwnd,
UINT message,
WPARAM wParam,
LPARAM lParam) {
static TCHAR fullPath[MAX_PATH], fileName[MAX_PATH];
TCHAR* pText;
static HWND hwndEdit;
switch(message) {
case WM_CREATE:
hwndEdit = CreateWindow(TEXT("edit"),
NULL,
WS_CHILD | WS_VISIBLE | ES_LEFT
| WS_HSCROLL | WS_VSCROLL | ES_MULTILINE |
ES_AUTOVSCROLL,
0, 0, 0, 0,
hwnd,
(HMENU)1,
(HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE),
NULL);
return 0;
case WM_SIZE:
MoveWindow(hwndEdit, 0, 0, LOWORD(lParam),
HIWORD(lParam), TRUE);
return 0;
case WM_COMMAND:
switch(LOWORD(wParam)) {
case IDM_FILE_OPEN:
if(!openDlg(hwnd, fullPath, fileName)) {
MessageBox(NULL, TEXT("can not open file."),
TEXT("Error"), MB_ICONERROR);
fullPath[0] = '\0';
fileName[0] = '\0';
return 0;
}
if(!openReadFile(hwndEdit, fullPath)) {
MessageBox(NULL, TEXT("error read file."),
TEXT("Error"), MB_ICONERROR);
fullPath[0] = '\0';
fileName[0] = '\0';
return 0;
}
break;
default:
break;
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
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