Remove check for multiple application instances

(it's currently not working any way)

Source/diablo.cpp

@@ -230,19 +230,11 @@ void free_game()
 	FreeGameMem();
 }
 
-BOOL diablo_get_not_running()
-{
-	SetLastError(0);
-	CreateEvent(NULL, FALSE, FALSE, "DiabloEvent");
-	return GetLastError() != ERROR_ALREADY_EXISTS;
-}
-
 int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 {
 	HINSTANCE hInst;
 	int nData;
 	char szFileName[MAX_PATH];
-	BOOL bNoEvent;
 
 	hInst = hInstance;
 	ghInst = hInst;
@@ -257,8 +249,7 @@ int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLi
 	srand(GetTickCount());
 	InitHash();
 
-	bNoEvent = diablo_get_not_running();
-	if (!diablo_find_window("DIABLO") && bNoEvent) {
+	{
 #ifdef _DEBUG
 		SFileEnableDirectAccess(TRUE);
 #endif
@@ -477,28 +468,6 @@ void diablo_init_screen()
 	ClrDiabloMsg();
 }
 
-BOOL diablo_find_window(LPCSTR lpClassName)
-{
-	HWND hWnd, active;
-
-	hWnd = FindWindow(lpClassName, 0);
-	if (!hWnd)
-		return FALSE;
-
-	active = GetLastActivePopup(hWnd);
-	if (active)
-		hWnd = active;
-
-	active = GetTopWindow(hWnd);
-	if (!active)
-		active = hWnd;
-
-	SetForegroundWindow(hWnd);
-	SetFocus(active);
-
-	return TRUE;
-}
-
 BOOL PressEscKey()
 {
 	BOOL rv = FALSE;

Source/diablo.h

@@ -116,11 +116,9 @@ BOOL StartGame(BOOL bNewGame, BOOL bSinglePlayer);
 void run_game_loop(unsigned int uMsg);
 void start_game(unsigned int uMsg);
 void free_game();
-BOOL diablo_get_not_running();
 int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow);
 void diablo_parse_flags(char *args);
 void diablo_init_screen();
-BOOL diablo_find_window(LPCSTR lpClassName);
 void diablo_reload_process(HINSTANCE hInstance);
 BOOL PressEscKey();
 LRESULT CALLBACK DisableInputWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

SourceS/miniwin/misc.h

@@ -232,8 +232,6 @@ WINBOOL WINAPI PostMessageA(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
 
 WINBOOL WINAPI DestroyWindow(HWND hWnd);
 HWND WINAPI GetLastActivePopup(HWND hWnd);
-HWND WINAPI GetTopWindow(HWND hWnd);
-WINBOOL WINAPI SetForegroundWindow(HWND hWnd);
 HWND WINAPI SetFocus(HWND hWnd);
 HWND CreateWindowExA(
     DWORD dwExStyle,
@@ -248,7 +246,6 @@ HWND CreateWindowExA(
     HMENU hMenu,
     HINSTANCE hInstance,
     LPVOID lpParam);
-HWND WINAPI FindWindowA(LPCSTR lpClassName, LPCSTR lpWindowName);
 BOOL InvalidateRect(HWND hWnd, const RECT *lpRect, BOOL bErase);
 BOOL UpdateWindow(HWND hWnd);
 BOOL ShowWindow(HWND hWnd, int nCmdShow);

SourceS/miniwin/misc_macro.h

@@ -35,8 +35,6 @@
 
 #define FOURCC_RIFF MAKEFOURCC('R', 'I', 'F', 'F')
 
-#define ERROR_ALREADY_EXISTS 183
-
 #define CreateEvent CreateEventA
 
 #define PM_NOREMOVE DVL_PM_NOREMOVE
@@ -47,7 +45,6 @@
 #define DispatchMessage DispatchMessageA
 #define PostMessage PostMessageA
 #define CreateWindowEx CreateWindowExA
-#define FindWindow FindWindowA
 #define RegisterClassEx RegisterClassExA
 #define GetUserName GetUserNameA
 #define LoadImage LoadImageA

SourceX/miniwin/misc.cpp

@@ -279,18 +279,6 @@ HWND GetLastActivePopup(HWND hWnd)
 	return hWnd;
 }
 
-HWND GetTopWindow(HWND hWnd)
-{
-	UNIMPLEMENTED();
-	return NULL;
-}
-
-WINBOOL SetForegroundWindow(HWND hWnd)
-{
-	UNIMPLEMENTED();
-	return true;
-}
-
 /**
  * @return Always null as it's unused
  */
@@ -301,12 +289,6 @@ HWND SetFocus(HWND hWnd)
 	return NULL;
 }
 
-HWND FindWindowA(LPCSTR lpClassName, LPCSTR lpWindowName)
-{
-	DUMMY_PRINT("class: %s window: %s", nullstr(lpClassName), nullstr(lpWindowName));
-	return NULL;
-}
-
 void FakeWMDestroy()
 {
 	MainWndProc(NULL, DVL_WM_DESTROY, 0, 0);