Code:
#include <windows.h>
#include <time.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
char szAppName[] = "Win32 API";
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, "This program requires Windows NT!",
szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow (szAppName,
"Win32 API",
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)
{
int i;
static int cyChar;
LOGFONT lf;
HDC hdc;
PAINTSTRUCT ps;
TEXTMETRIC text_metric;
time_t time_t_struct;
tm tm_struct;
time(&time_t_struct);
tm_struct = *(localtime(&time_t_struct));
char *week_day[] = {"Domingo", "Segunda-feira", "Terça-feira",
"Quarta-feira", "Quinta-feira", "Sexta-feira",
"Sábado"};
char *month[] = {"Janeiro", "Fevereiro", "Março", "Abril", "Maio",
"Junho", "Julho", "Agosto", "Setembro", "Outubro",
"Novembro", "Dezembro"};
char *date_and_time[] = {week_day[tm_struct.w_day], ", ", tm_struct.m_day};
char *introduction[] = {"Welcome!",
"Win32 API.",
"C.",
"-------------------------------------------------"};
switch (message)
{
case WM_CREATE:
hdc = GetDC(hwnd);
GetTextMetrics(hdc, &text_metric);
cyChar = text_metric.tmHeight + text_metric.tmExternalLeading;
ReleaseDC(hwnd, hdc);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps) ;
GetObject(GetStockObject(SYSTEM_FONT), sizeof(lf), &lf);
lf.lfHeight = 10;
lf.lfWeight = 0;
strcpy(lf.lfFaceName, "Courier");
SelectObject(hdc, CreateFontIndirect(&lf));
for(i = 0; i != sizeof(introduction) / 4; i++)
TextOut(hdc, 0, cyChar * i, introduction[i], strlen(introduction[i]));
DeleteObject(SelectObject(hdc, GetStockObject(SYSTEM_FONT)));
UpdateWindow (hwnd);
EndPaint(hwnd, &ps);
return 0 ;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
I just don't understand why I get this error: