Linguagem C - GetSystemMetrics(SM_CYCAPTION);

#include <windows.h> LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR szCmdLine,int iCmdShow) { static TCHAR szAppName[] = TEXT("BitBlt"); 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_INFORMATION); wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); wndclass.hbrBackground = (HBRUSH) WHITE_BRUSH; wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; if(!RegisterClass(&wndclass)) { MessageBox(NULL, TEXT("Requires Windows NT!"),szAppName, MB_ICONERROR); return 0; } hwnd = CreateWindow( szAppName, TEXT("BitBlt Demo"), WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 500, 300, 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 int cxClient, cyClient, cxSource, cySource; HDC hdcClient, hdcWindow; int x, y; PAINTSTRUCT ps; switch(message) { case WM_CREATE: cxSource = GetSystemMetrics(SM_CXSIZEFRAME) + GetSystemMetrics(SM_CXSIZE); cySource = GetSystemMetrics(SM_CYSIZEFRAME) + GetSystemMetrics(SM_CYCAPTION); return 0; case WM_SIZE: cxClient = LOWORD(lParam); cyClient = HIWORD(lParam); return 0; case WM_PAINT: hdcClient = BeginPaint(hwnd, &ps); hdcWindow = GetWindowDC(hwnd); for(y = 0; y < cyClient; y += cySource) for(x = 0; x < cxClient; x += cxSource) { BitBlt(hdcClient, x, y, cxSource, cySource, hdcWindow, 0, 0, SRCCOPY); } ReleaseDC(hwnd, hdcWindow); EndPaint (hwnd, &ps); return 0; case WM_DESTROY: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd, message, wParam, lParam); }