學習windows編程 day1

標籤：cat   idt   函數   pen   cal   rsa   span   chm   menu   

#include <windows.h>#include <strsafe.h>/*        任務：去掉標題列和邊框*///#define LineHeight 15 這是自己猜測的行高，不要這樣做LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd){    static TCHAR szClassName[] = TEXT("MyWindows2");    HWND hwnd;    MSG msg;    //註冊一個視窗類別    //註冊視窗類別    WNDCLASS wndclass;    wndclass.hInstance = hInstance;    wndclass.lpszClassName = szClassName;    wndclass.cbClsExtra = 0;    wndclass.cbWndExtra = 0;    wndclass.lpfnWndProc = WndProc;    wndclass.lpszMenuName = NULL;    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);    wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);    wndclass.style = CS_HREDRAW;    if (!RegisterClass(&wndclass))    {        MessageBox(NULL, L"Error", L"Error", MB_ICONERROR);        return 0;    }    //建立視窗    hwnd = CreateWindow(        szClassName,        TEXT("MyFirstPractice"),        //方法一        //WS_OVERLAPPEDWINDOW &~WS_CAPTION &~WS_SYSMENU &~WS_SIZEBOX,        WS_OVERLAPPEDWINDOW,        CW_USEDEFAULT,        CW_USEDEFAULT,        CW_USEDEFAULT,        CW_USEDEFAULT,        NULL,        NULL,        hInstance,        NULL        );    ShowWindow(hwnd, nShowCmd);    UpdateWindow(hwnd);    while (GetMessage(&msg, NULL, 0, 0))    {        TranslateMessage(&msg);        //此處分發訊息，調用訊息回呼函數，        //同時訊息回呼函數的傳回值作為DIspatchMessage的傳回值返回，        //一般講這個傳回值忽略        DispatchMessage(&msg);        /*        The return value specifies the value returned by the window procedure. Although its meaning depends on the message being dispatched, the return value generally is ignored.         傳回值指定視窗過程返回的值。儘管它的含義依賴於發送的訊息，但是傳回值通常被忽略。        */    }    return msg.wParam;}/*WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)和typedef struct tagMSG {HWND   hwnd;UINT   message;WPARAM wParam;LPARAM lParam;DWORD  time;POINT  pt;} MSG, *PMSG;前四個參數一致作業系統直接使用msg前四位作為參數傳入視窗回呼函數*/LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){    HDC hdc;    PAINTSTRUCT ps;    RECT rect;    TCHAR szBuffer[128];    size_t iTarget;    TEXTMETRIC tm;    static int cxChar, cyChar;    switch (message)    {    case WM_CREATE:        //在建立時就設定為靜態全域變數，在後面的訊息觸發是就可以直接使用了        hdc = GetDC(hwnd);        //獲得當前字型的尺寸        GetTextMetrics(hdc,&tm);        //系統擷取行距等資訊，不要自己猜測        cxChar = tm.tmAveCharWidth;        cyChar = tm.tmHeight + tm.tmExternalLeading;        ReleaseDC(hwnd,hdc);    case WM_SIZE:        ; LONG_PTR s = GetWindowLongPtr(hwnd, GWL_STYLE);        //s = s &~WS_CAPTION &~WS_SYSMENU&~WS_SIZEBOX;        s = s&~WS_SIZEBOX;        SetWindowLongPtr(hwnd,GWL_STYLE, s);        break;    case WM_LBUTTONDOWN:        if (IDYES == MessageBox(NULL, L"Are you sure to quit?", L"Info", MB_YESNO)){            PostQuitMessage(0);        }        break;    case WM_NCLBUTTONUP:        MessageBox(NULL, L"Clicked on Not client Area", L"Info", NULL);        break;    case WM_PAINT:        hdc = BeginPaint(hwnd, &ps);        GetClientRect(hwnd, &rect);        //SetTextAlign(hdc, GetTextAlign(hdc) | TA_CENTER);        int i = 0;        for (; i < 10;i++)        {            //使用安全的字串方法，防止溢出等原因            StringCchPrintf(szBuffer, 128, TEXT("%d: %s"),i+1,TEXT("I love C++"));            //wsprintf(szBuffer, TEXT("%d: %s"),i+1, TEXT("I love C++"));                        StringCchLength(szBuffer, 128, &iTarget);            //取代了lstrlen            //TextOut(hdc, 0,i*LineHeight, szBuffer, lstrlen(szBuffer));            TextOut(hdc, cxChar, i*cyChar, szBuffer, iTarget);        }        //TextOut(hdc, 400, 300, L"this is my second program", 20);        //DrawText(hdc, L"this is my second program", -1, &rect, DT_CENTER | DT_VCENTER | DT_SINGLELINE);        EndPaint(hwnd, &ps);        break;    case WM_CLOSE:        if (IDYES == MessageBox(NULL, L"Are you sure to quit?", L"Info", MB_YESNO))        {            DestroyWindow(hwnd);        }        break;    case WM_DESTROY:        MessageBox(NULL, L"GUI is close,deal sql before quit", L"Info", MB_OK);        PostQuitMessage(0);        break;    case WM_QUIT:        break;    default:        return DefWindowProc(hwnd, message, wParam, lParam);    }    return 0;}

學習windows編程 day1