diff -r 9a4bbc1f67a2 -r 2fc211f60015 QTfrontend/hwform.cpp
--- a/QTfrontend/hwform.cpp	Wed Oct 06 15:37:56 2010 -0400
+++ b/QTfrontend/hwform.cpp	Wed Oct 06 22:36:41 2010 +0200
@@ -141,6 +141,9 @@
     connect(ui.pageOptions->BtnDeleteTeam, SIGNAL(clicked()), this, SLOT(DeleteTeam()));
     connect(ui.pageOptions->BtnSaveOptions, SIGNAL(clicked()), config, SLOT(SaveOptions()));
     connect(ui.pageOptions->BtnSaveOptions, SIGNAL(clicked()), this, SLOT(GoBack()));
+#ifdef _WIN32
+    connect(ui.pageOptions->BtnAssociateFiles, SIGNAL(clicked()), this, SLOT(AssociateFiles()));
+#endif
 
     connect(ui.pageOptions->WeaponEdit, SIGNAL(clicked()), this, SLOT(GoToSelectWeapon()));
     connect(ui.pageOptions->WeaponsButt, SIGNAL(clicked()), this, SLOT(GoToSelectNewWeapon()));
@@ -1110,3 +1113,17 @@
     for(int i = 0; (i < entries.count()) && (i <= team.CampaignProgress); i++)
         ui.pageCampaign->CBSelect->addItem(QString(entries[i]).replace(QRegExp("^(\\d+)#(.+)\\.lua"), QComboBox::tr("Mission") + " \\1: \\2"), QString(entries[i]).replace(QRegExp("^(.*)\\.lua"), "\\1"));
 }
+
+void HWForm::AssociateFiles()
+{
+    QSettings registry_hkcr("HKEY_CLASSES_ROOT", QSettings::NativeFormat);
+    registry_hkcr.setValue(".hwd/Default", "Hedgewars.Demo");
+    registry_hkcr.setValue(".hws/Default", "Hedgewars.Save");
+    registry_hkcr.setValue("Hedgewars.Demo/Default", tr("Hedgewars Demo File", "File Types"));
+    registry_hkcr.setValue("Hedgewars.Save/Default", tr("Hedgewars Save File", "File Types"));
+    registry_hkcr.setValue("Hedgewars.Demo/DefaultIcon/Default", "\"" + bindir->absolutePath().replace("/", "\\") + "\\hwdfile.ico\",0");
+    registry_hkcr.setValue("Hedgewars.Save/DefaultIcon/Default", "\"" + bindir->absolutePath().replace("/", "\\") + "\\hwsfile.ico\",0");
+    registry_hkcr.setValue("Hedgewars.Demo/Shell/Open/Command/Default", "\"" + bindir->absolutePath().replace("/", "\\") + "\\hwengine.exe\" \"" + datadir->absolutePath().replace("/", "\\") + "\" \"%1\"");
+    registry_hkcr.setValue("Hedgewars.Save/Shell/Open/Command/Default", "\"" + bindir->absolutePath().replace("/", "\\") + "\\hwengine.exe\" \"" + datadir->absolutePath().replace("/", "\\") + "\" \"%1\"");
+    QMessageBox::information(0, "", QMessageBox::tr("All file associations have been set."));
+}