From 614febabf6ee776e6d9d4f0feb48ba4b552e673c Mon Sep 17 00:00:00 2001
From: FunkyFr3sh <cc.red.alert.1@googlemail.com>
Date: Tue, 15 Aug 2023 15:38:50 +0200
Subject: [PATCH] allow only 1 instance per game folder

---
 config/ConfigFormUnit.cpp   | 10 ++++++++++
 config/ConfigFormUnit.h     |  1 +
 config/cnc-ddraw config.cpp | 17 ++++++++++++++++-
 3 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/config/ConfigFormUnit.cpp b/config/ConfigFormUnit.cpp
index 6bfd98b..0178e22 100644
--- a/config/ConfigFormUnit.cpp
+++ b/config/ConfigFormUnit.cpp
@@ -8,6 +8,7 @@
 #include <IOUtils.hpp>
 #include <SysUtils.hpp>
 #include <Registry.hpp>
+#include <System.Hash.hpp>
 #include "ConfigFormUnit.h"
 //---------------------------------------------------------------------------
 #pragma package(smart_init)
@@ -28,6 +29,15 @@ __fastcall TConfigForm::TConfigForm(TComponent* Owner)
 {
 }
 
+void __fastcall TConfigForm::CreateParams(TCreateParams & Params)
+{
+	TForm::CreateParams(Params);
+
+	StrCopy(
+		Params.WinClassName,
+		THashSHA1::GetHashString(Application->ExeName).w_str());
+}
+
 void __fastcall TConfigForm::LanguageImgClick(TObject *Sender)
 {
 	auto *ini = new TIniFile(".\\ddraw.ini");
diff --git a/config/ConfigFormUnit.h b/config/ConfigFormUnit.h
index 1abcb9e..2e16295 100644
--- a/config/ConfigFormUnit.h
+++ b/config/ConfigFormUnit.h
@@ -115,6 +115,7 @@ __published:	// Von der IDE verwaltete Komponenten
 
 
 private:	// Benutzer-Deklarationen
+	virtual void __fastcall CreateParams(TCreateParams & Params);
 	void SaveSettings();
 	bool GetBool(TIniFile *ini, System::UnicodeString key, bool defValue);
 	void ApplyTranslation(TIniFile *ini);
diff --git a/config/cnc-ddraw config.cpp b/config/cnc-ddraw config.cpp
index 958693d..df2488f 100644
--- a/config/cnc-ddraw config.cpp	
+++ b/config/cnc-ddraw config.cpp	
@@ -1,8 +1,9 @@
 //---------------------------------------------------------------------------
 
 #include <vcl.h>
-#include <IniFiles.hpp>
 #pragma hdrstop
+#include <IniFiles.hpp>
+#include <System.Hash.hpp>
 #include <tchar.h>
 //---------------------------------------------------------------------------
 #include <Vcl.Styles.hpp>
@@ -16,6 +17,20 @@ int WINAPI _tWinMain(HINSTANCE, HINSTANCE, LPTSTR, int)
 		Application->Initialize();
 		Application->MainFormOnTaskBar = true;
 
+		HWND hwnd =
+			FindWindow(
+				THashSHA1::GetHashString(Application->ExeName).w_str(), NULL);
+
+		if (hwnd) {
+
+			if (IsIconic(hwnd)) {
+				ShowWindow(hwnd, SW_RESTORE);
+			}
+
+			SetForegroundWindow(hwnd);
+			return 0;
+		}
+
 		auto *ini = new TIniFile(".\\ddraw.ini");
 		auto theme = ini->ReadString("ddraw", "configtheme", "Windows10");