用编辑控件实现记事本

当然，此为非常初级的记事本。

在CreateWindow函数当中， WS_VSCROLL与ES_AUTOVSCROLL必须同时存在啊，不信的话可以自己去试^_^

 

#include <windows.h>
#define ID_EDIT 1
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
TCHAR szAppName[] = TEXT("pad");
int WINAPI WinMain(HINSTANCE hInstance,
                 HINSTANCE hPrevInstance,
                 PSTR szCmdLine,
                 int iCmdShow) {
    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(NULL, IDI_APPLICATION);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName = NULL;
    wndclass.lpszClassName = szAppName;
    
    if(!RegisterClass(&wndclass)) {
        MessageBox(NULL,
            TEXT("not windows nt"),
            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;
}

LRESULT CALLBACK WndProc(HWND hwnd,
                         UINT message,
                         WPARAM wParam,
                         LPARAM lParam) {
    static HWND hwndEdit;
    switch(message) {
    case WM_CREATE:
        hwndEdit = CreateWindow(TEXT("edit"),
            NULL,
            WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL |
            WS_BORDER | ES_LEFT | ES_MULTILINE |
            ES_AUTOHSCROLL | ES_AUTOVSCROLL,
            0, 0, 0, 0,
            hwnd,
            (HMENU)ID_EDIT,
            ((LPCREATESTRUCT)lParam)->hInstance,
            NULL);
        return 0;
        
    case WM_SETFOCUS:
        SetFocus(hwndEdit);
        return 0;
        
    case WM_SIZE:
        MoveWindow(hwndEdit, 0, 0, LOWORD(lParam), HIWORD(lParam), TRUE);
        return 0;
        
    case WM_COMMAND:
        if(LOWORD(wParam) == ID_EDIT)
            if(HIWORD(wParam) == EN_ERRSPACE ||
                HIWORD(wParam) == EN_MAXTEXT)
                MessageBox(hwnd, TEXT("Edit control out of space"),
                szAppName, MB_OK | MB_ICONSTOP);
            return 0;
            
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}