Index: APPS/EC/Winkelkar/WinkelkarService.cls.xml
===================================================================
diff -u -r37430 -r38791
--- APPS/EC/Winkelkar/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 37430)
+++ APPS/EC/Winkelkar/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 38791)
@@ -4,6 +4,11 @@
 <Abstract>1</Abstract>
 <Super>TECH.Interface</Super>
 
+<Method name="ControleerWinkelkarViaExterneId">
+<Abstract>1</Abstract>
+<FormalSpec>ExterneId:%String=""</FormalSpec>
+</Method>
+
 <Method name="MaakWinkelkarVanIngevuldeDto">
 <Abstract>1</Abstract>
 <FormalSpec>WinkelkarID:%String</FormalSpec>
Index: vhTest/Mock/APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml
===================================================================
diff -u -r38789 -r38791
--- vhTest/Mock/APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 38789)
+++ vhTest/Mock/APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 38791)
@@ -9,6 +9,12 @@
 <Super>APPS.EC.Winkelkar.impl.WinkelkarService,vhTest.Mock.APPS.EC.Winkelkar.WinkelkarService</Super>
 <Inheritance>right</Inheritance>
 
+<Method name="ControleerWinkelkarViaExterneId">
+<FormalSpec>ExterneId:%String=""</FormalSpec>
+<Implementation><![CDATA[	do ..VerwerkMethodCall("ControleerWinkelkarViaExterneId",ExterneId)
+]]></Implementation>
+</Method>
+
 <Method name="DupliceerLijn">
 <FormalSpec>WinkelkarID:%String,LijnID:%String</FormalSpec>
 <ReturnType>APPS.EC.Winkelkar.dto.Lijn</ReturnType>
Index: APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml
===================================================================
diff -u -r38789 -r38791
--- APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 38789)
+++ APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 38791)
@@ -104,6 +104,15 @@
 ]]></Implementation>
 </Method>
 
+<Method name="ControleerWinkelkarViaExterneId">
+<FormalSpec>ExterneId:%String=""</FormalSpec>
+<Implementation><![CDATA[
+	If ..WinkelkarRepository.BestaatViaExterneId(ExterneId) {
+		Do ##class(TECH.ExceptionHandler).Throw(##class(TECH.Exceptions.GeneralErrorException).%New("Er bestaat reeds een winkelkar met ExterneId "_ExterneId))			
+	}
+]]></Implementation>
+</Method>
+
 <Method name="MaakWinkelkarVanIngevuldeDto">
 <FormalSpec>WinkelkarID:%String</FormalSpec>
 <ReturnType>APPS.EC.Winkelkar.dto.Winkelkar</ReturnType>
Index: vhTest/Mock/APPS/EC/Winkelkar/WinkelkarService.cls.xml
===================================================================
diff -u -r37430 -r38791
--- vhTest/Mock/APPS/EC/Winkelkar/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 37430)
+++ vhTest/Mock/APPS/EC/Winkelkar/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 38791)
@@ -15,6 +15,12 @@
 ]]></Implementation>
 </Method>
 
+<Method name="ControleerWinkelkarViaExterneId">
+<FormalSpec>ExterneId:%String=""</FormalSpec>
+<Implementation><![CDATA[	do ..VerwerkMethodCall("ControleerWinkelkarViaExterneId",ExterneId)
+]]></Implementation>
+</Method>
+
 <Method name="DupliceerLijn">
 <FormalSpec>WinkelkarID:%String,LijnID:%String</FormalSpec>
 <ReturnType>APPS.EC.Winkelkar.dto.Lijn</ReturnType>
Index: vhTest/Fake/APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml
===================================================================
diff -u -r37432 -r38791
--- vhTest/Fake/APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 37432)
+++ vhTest/Fake/APPS/EC/Winkelkar/impl/WinkelkarService.cls.xml	(.../WinkelkarService.cls.xml)	(revision 38791)
@@ -14,6 +14,11 @@
 ]]></Implementation>
 </Method>
 
+<Method name="ControleerWinkelkarViaExterneId">
+<FormalSpec>ExterneId:%String=""</FormalSpec>
+<Implementation><![CDATA[]]></Implementation>
+</Method>
+
 <Method name="GeefLijn">
 <FormalSpec>WinkelkarID:%String,LijnID:%String</FormalSpec>
 <ReturnType>APPS.EC.Winkelkar.dto.Lijn</ReturnType>