63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
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#include <windows.h>
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#include "resource.h"
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#include "dlgapp.h"
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#include "util.h"
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// Code to ensure only one instance of a particular window is running
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HANDLE CheckForOtherInstance(HINSTANCE hInstance)
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{
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TCHAR szCaption[128];
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HANDLE hMutex;
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LoadStringAuto(hInstance, IDS_TITLEBAR, szCaption, 128);
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// We create a named mutex with our window caption just as a way to check
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// if we are already running autorun.exe. Only if we are the first to
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// create the mutex do we continue.
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hMutex = CreateMutex (NULL, FALSE, szCaption);
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if ( !hMutex )
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{
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// failed to create the mutex
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return 0;
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}
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else if (GetLastError() == ERROR_ALREADY_EXISTS)
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{
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// Mutex created but by someone else, activate that window
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HWND hwnd = FindWindow( WINDOW_CLASS, szCaption );
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SetForegroundWindow(hwnd);
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CloseHandle(hMutex);
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return 0;
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}
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// we are the first
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return hMutex;
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}
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/**
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* This function is the main entry point into our application.
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*
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* @return int Exit code.
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*/
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int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLin, int nShowCmd )
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{
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HANDLE hMutex = CheckForOtherInstance(hInstance);
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if ( hMutex )
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{
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CDlgApp dlgapp;
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dlgapp.Register(hInstance);
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if ( dlgapp.InitializeData(lpCmdLin) )
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{
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dlgapp.Create(nShowCmd);
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dlgapp.MessageLoop();
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}
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CloseHandle(hMutex);
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}
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return 0;
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}
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