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Windows 95 API Bible
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Windows 95 API Bible 3 Disc Set.iso
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Win32 API Bible Book 3 of 3
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CHAPTE23
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TIMER.C
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C/C++ Source or Header
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1996-04-29
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7KB
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262 lines
#include <windows.h>
#include <stdio.h>
#include "Timer.h"
#if defined (WIN32)
#define IS_WIN32 TRUE
#else
#define IS_WIN32 FALSE
#endif
#define IS_NT IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
#define IS_WIN32S IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
#define IS_WIN95 (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
HINSTANCE hInst; // current instance
LPCTSTR lpszAppName = "MyApp";
LPCTSTR lpszTitle = "My Application";
// the rest of the stuff
//......................
BOOL RegisterWin95( CONST WNDCLASS* lpwc );
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPTSTR lpCmdLine, int nCmdShow)
{
MSG msg;
HWND hWnd;
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wc.lpfnWndProc = (WNDPROC)WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon (hInstance, lpszAppName);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = lpszAppName;
wc.lpszClassName = lpszAppName;
if ( IS_WIN95 )
{
if ( !RegisterWin95( &wc ) )
return( FALSE );
}
else if ( !RegisterClass( &wc ) )
return( FALSE );
hInst = hInstance;
hWnd = CreateWindow( lpszAppName,
lpszTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0,
CW_USEDEFAULT, 0,
NULL,
NULL,
hInstance,
NULL
);
if ( !hWnd )
return( FALSE );
ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );
while( GetMessage( &msg, NULL, 0, 0) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
return( msg.wParam );
}
BOOL RegisterWin95( CONST WNDCLASS* lpwc )
{
WNDCLASSEX wcex;
wcex.style = lpwc->style;
wcex.lpfnWndProc = lpwc->lpfnWndProc;
wcex.cbClsExtra = lpwc->cbClsExtra;
wcex.cbWndExtra = lpwc->cbWndExtra;
wcex.hInstance = lpwc->hInstance;
wcex.hIcon = lpwc->hIcon;
wcex.hCursor = lpwc->hCursor;
wcex.hbrBackground = lpwc->hbrBackground;
wcex.lpszMenuName = lpwc->lpszMenuName;
wcex.lpszClassName = lpwc->lpszClassName;
// Added elements for Windows 95.
//...............................
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName,
IMAGE_ICON, 16, 16,
LR_DEFAULTCOLOR );
return RegisterClassEx( &wcex );
}
LRESULT CALLBACK About( HWND hDlg,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return (TRUE);
case WM_COMMAND:
if ( LOWORD(wParam) == IDOK
|| LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, TRUE);
return (TRUE);
}
break;
}
return (FALSE);
}
#define USR_TIMER_ELAPSED (WM_USER+1)
BOOL CALLBACK TimerDlg(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam);
VOID CALLBACK timeProc(UINT nTimerId, UINT msg, DWORD dwUser, DWORD dwParam1, DWORD dwParam2);
LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
switch( uMsg )
{
case WM_COMMAND :
switch( LOWORD( wParam ) )
{
case IDM_TEST:
DialogBox(hInst, "TimerDlg", hWnd, TimerDlg);
break;
case IDM_ABOUT :
DialogBox( hInst, "AboutBox", hWnd, About );
break;
case IDM_EXIT :
DestroyWindow( hWnd );
break;
}
break;
case WM_DESTROY :
PostQuitMessage(0);
break;
default :
return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
}
return( 0L );
}
BOOL CALLBACK TimerDlg(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
static UINT nTimerId;
static UINT nMs;
static UINT nEvents; // number of timer events.
switch (uMsg)
{
// init dialog
//.............
case WM_INITDIALOG:
{
TIMECAPS tc;
nTimerId = 0;
nEvents = 0;
nMs = 500;
timeGetDevCaps(&tc, sizeof(TIMECAPS) );
if (nMs < tc.wPeriodMin)
nMs = tc.wPeriodMin;
else if (nMs > tc.wPeriodMax)
nMs = tc.wPeriodMax;
timeBeginPeriod(nMs);
nTimerId = timeSetEvent(nMs, nMs, timeProc, (DWORD)hDlg,
TIME_PERIODIC);
if (!nTimerId)
{
timeEndPeriod(nMs);
MessageBox(hDlg, "Error setting up timer...", NULL, MB_OK);
EndDialog(hDlg, FALSE);
return(TRUE);
}
}
return(TRUE);
case USR_TIMER_ELAPSED :
nEvents++;
SetDlgItemInt(hDlg, IDC_TIMER_EC, nEvents, FALSE);
break;
// commands
//.........
case WM_COMMAND:
switch ( LOWORD(wParam) )
{
// close down
//...........
case WM_CLOSE:
case IDOK:
case IDCANCEL:
{
// Shut down timer
//................
timeKillEvent(nTimerId);
timeEndPeriod(nMs);
EndDialog(hDlg, TRUE);
}
break;
}
break;
}
return (FALSE);
}
VOID CALLBACK timeProc(UINT nTimerId, UINT msg, DWORD dwUser, DWORD dwParam1, DWORD dwParam2)
{
PostMessage((HWND)dwUser, USR_TIMER_ELAPSED, 0, 0);
}