Windows API 9-9 multiplication table [To be continued]

Degree of understanding: so far, I have found some places where I can add logic code, but I am not very familiar with some statements, such as wprintf and TextOut functions, therefore, only the result of the multiplication table can be output to the display screen. I also found a lot of instructions on the Internet, but it did not solve my problem. Let's share the code first. Whatever the case, the first thing I made with Windows APIs has been listed. Haha ...... Solve this problem in the future ...... The Windows API code is as follows: [cpp]/* HELLOWIN. C -- Displays (Display) * 9-9 multiplication table * in client area Display 9-9 multiplication table */# include <windows. h> // # pragma comment (lib, "WINMM. LIB ") lresult callback WndProc (HWND, UINT, WPARAM, LPARAM); // UINT indicates unsigned int. this is the declaration of the window process int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR sz1_line, int iCmdShow) // PSTR is a pointer to a non-wide string {static TCHAR szAppname [] = TEXT ("HELLOWIN"); HWND hwnd; MSG msg; // message structure WNDCLASS wndclass; // window class structure wndclass. style = CS_HREDRAW | CS_VREDRAW; wndclass. lpfnWndProc = WndProc; // is this a reference of WndProc? Wndclass. cbClsExtra = 0; wndclass. cbWndExtra = 0; wndclass. hInstance = hInstance; // instance handle wndclass. hIcon = LoadIcon (NULL, IDI_APPLICATION); // set the target wndclass. hCursor = LoadCursor (NULL, IDC_ARROW); // predefined wndclass pointer. hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH); // specify the system color wndclass with a white paint brush. lpszMenuName = NULL; // name of the menu window class wndclass. lpszClassName = szAppname; // if (! RegisterClass (& wndclass) {MessageBox (NULL, TEXT ("what is this"), szAppname, MB_ICONERROR); return 0;} hwnd = CreateWindow (szAppname, // hwnd is the handle, szappname is the name of the window class TEXT ("jiujiu multiplication table"), // The window title WS_OVERLAPPEDWINDOW, // The window style (window format) CW_USEDEFAULT, // The initial x coordinate CW_USEDEFAULT, // initial y coordinate CW_USEDEFAULT, // initial x direction dimension CW_USEDEFAULT, // initial y direction dimension NULL, // parent window handle NULL, // Window menu handle hInstance, // program instance handle NULL); // create the ShowWindow (hwnd, iCmdSh) parameter Ow); UpdateWindow (hwnd); while (GetMessage (& msg, NULL, 0, 0) // message loop {TranslateMessage (& msg); DispatchMessage (& msg );} return msg. wParam;} lresult callback WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {HDC hdc; PAINTSTRUCT ps; // draw structure RECT rect; // static int cxChar, cxCaps, cyChar; int iLength; TCHAR szBuffer [50]; TEXTMETRIC tm; int I, j, a [10] [10]; for (j = 1; J <10; j ++) {for (I = 1; I <= j; I ++) {a [I] [j] = I * j ;}} switch (message) {case WM_CREATE: hdc = GetDC (hwnd); GetTextMetrics (hdc, & tm); cxChar = tm. tmAveCharWidth; cyChar = tm. tmHeight + tm. tmExternalLeading; cxCaps = (tm. tmPitchAndFamily & 1? 3: 2) * cxChar/2; ReleaseDC (hwnd, hdc); return 0; case WM_PAINT: hdc = BeginPaint (hwnd, & ps); for (j = 1; j <10; j ++) {for (I = 1; I <= j; I ++) {iLength = wsprintf (szBuffer, TEXT ("% I "), a [I] [j]); TextOut (hdc, cxCaps * 4 * I, cyChar * j * 3, szBuffer, iLength) ;}} EndPaint (hwnd, & ps ); return 0; case WM_DESTROY: PostQuitMessage (0); return 0;} return DefWindowProc (hwnd, message, wParam, lParam);} running result: