Exemplo Básico

main.html #include <windows.h> #include <stdio.h> #define BTN_MEDIA 1 void Controles ( HWND ); static HWND num1 , num2 , num3 , num4 , r ; LRESULT CALLBACK WndProc ( HWND hwnd , UINT msg , WPARAM wP , LPARAM lP ) { switch ( msg ) { case WM_CREATE : Controles ( hwnd ); return 0 ; case WM_COMMAND : if ( LOWORD ( wP )== BTN_MEDIA ) { int n1 = GetWindowTextLength ( num1 )+ 1 ; int n2 = GetWindowTextLength ( num2 )+ 1 ; int n3 = GetWindowTextLength ( num3 )+ 1 ; int n4 = GetWindowTextLength ( num4 )+ 1 ; static char t1 [ 50 ], t2 [ 50 ], t3 [ 50 ], t4 [ 50 ]; GetWindowText ( num1 , t1 , n1 ); GetWindowText ( num2 , t2 , n2 ); GetWindowText ( num3 , t3 , n3 ); GetWindowText ( num4 , t4 , n4 ); floa...

A função GetTextExtentPoint32 calcula a largura e a altura da sequência de texto especificada.

main.html #include <windows.h> #include <stdio.h> #include "resource.h" LRESULT CALLBACK WndProc ( HWND , UINT , WPARAM , LPARAM ); TCHAR szAppName [] = TEXT ( "resource_rc" ); TCHAR pWindows [] = TEXT ( "Programação para Windows" ); TCHAR tArquivo []; int WINAPI WinMain ( HINSTANCE hI , HINSTANCE hPI , PSTR szCL , int iCS ) { HWND hwnd ; MSG msg ; WNDCLASS wndclass ; wndclass . style = CS_HREDRAW | CS_VREDRAW ; wndclass . lpfnWndProc = WndProc ; wndclass . cbClsExtra = 0 ; wndclass . cbWndExtra = 0 ; wndclass . hInstance = hI ; wndclass . hIcon = LoadIcon ( NULL , IDI_APPLICATION ); wndclass . hCursor = LoadCursor ( NULL , IDC_ARROW ); wndclass . hbrBackground = ( HBRUSH ) GetStockObject ( WHITE_BRUSH ); wndclass . lpszMenuName = szAppName ; wndclass . lpszClassName = szAppName ; if (! RegisterClass (& wndcla...

Desenha um retângulo na área do cliente

main.html #include <windows.h> LRESULT CALLBACK WndProc ( HWND hwnd , UINT msg , WPARAM wP , LPARAM lP ) { PAINTSTRUCT ps ; HBRUSH hBrush ; HDC hdc ; RECT rect ; switch ( msg ) { case WM_PAINT : BeginPaint ( hwnd , & ps ); hdc = GetDC ( hwnd ); GetClientRect ( hwnd , & rect ); hBrush = CreateSolidBrush ( RGB ( 77 , 0 , 77 )); hBrush = ( HBRUSH ) SelectObject ( hdc , hBrush ); Rectangle ( hdc , 80 , 80 , rect . right - 16 , rect . bottom - 45 ); DeleteObject ( SelectObject ( hdc , hBrush )); EndPaint ( hwnd , & ps ); break ; case WM_DESTROY : { PostQuitMessage ( 0 ); break ; } default : return DefWindowProc ( hwnd , msg , wP , lP ); } return 0 ; } int WINAPI WinMain ( HINSTANCE hI , HINSTANCE hPI , LPSTR szCL , in...

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