Index: uppsrc/CtrlLib/Splitter.cpp
===================================================================
--- uppsrc/CtrlLib/Splitter.cpp	(revision 2445)
+++ uppsrc/CtrlLib/Splitter.cpp	(working copy)
@@ -85,6 +85,10 @@
 	if(HasCapture() && mouseindex >= 0 && mouseindex < pos.GetCount()) {
 		SetPos(ClientToPos(p), mouseindex);
 		WhenAction();
+		
+		if(!is_captured){
+			is_captured = true;
+		}
 	}
 }
 
@@ -108,6 +112,11 @@
 }
 
 void   Splitter::LeftUp(Point p, dword keyflags) {
+	if(is_captured){
+		is_captured = false;
+		if(WhenEndResize)
+			WhenEndResize();
+	}
 	Refresh();
 }
 
@@ -249,6 +258,7 @@
 }
 
 Splitter::Splitter() {
+	is_captured = false;
 	style = -1;
 	pos.Add(5000);
 	width = 4;
Index: uppsrc/CtrlLib/Splitter.h
===================================================================
--- uppsrc/CtrlLib/Splitter.h	(revision 2445)
+++ uppsrc/CtrlLib/Splitter.h	(working copy)
@@ -7,7 +7,7 @@
 	virtual void   LeftUp(Point p, dword keyflags);
 	virtual Image  CursorImage(Point p, dword keyflags);
 	virtual void   Serialize(Stream& s);
-
+	Callback WhenEndResize;
 public:
 	struct Style : ChStyle<Style> {
 		Value vert[2], horz[2];
@@ -66,6 +66,8 @@
 
 	Splitter();
 	virtual ~Splitter();
+private:
+	bool is_captured;
 };
 
 class SplitterFrame : public CtrlFrame, private Ctrl {