Callback2<String&, int> LabelFormat;

slider.LabelFormat = THISBACK(LabelFormatting);

void LabelFormatting(String &str, int val) {
	str = SecondsToString(val, false);
}

#ifndef _JBControlsTest_JBControlsTest_h
#define _JBControlsTest_JBControlsTest_h

#include <CtrlLib/CtrlLib.h>
#include <Controls4U/Controls4U.h>
#include <JBControls/SliderCtrlX.h>

using namespace Upp;

class JBControlsTest : public TopWindow {
public:
	typedef JBControlsTest CLASSNAME;
	JBControlsTest();
	
	SliderCtrlX slider;
};

#endif

#include "JBControlsTest.h"

JBControlsTest::JBControlsTest()
{
	Add(slider.FillColor(Color(255, 85, 0)).SetThickness(3).SetThumbType(4).LeftPosZ(63, 330).TopPosZ(220, 52));
	slider.Jump(true);
}

GUI_APP_MAIN
{
	JBControlsTest().Run();
}

#include "JBControlsTest.h"

JBControlsTest::JBControlsTest()
{
	Add(slider.FillColor(Color(255, 85, 0)).SetThickness(3).SetThumbType(4).Jump(true).LeftPosZ(63, 330).TopPosZ(220, 52));
}

GUI_APP_MAIN
{
	JBControlsTest().Run();
}

...
private:
...
	bool		  	m_bJump;			// Jumps directly to mouse pos if click on the scale
...
public:
...
	SliderCtrlX&	Jump(bool v = false)		  		{ m_bJump = v; }
...

...
SliderCtrlX::SliderCtrlX()
: m_nMin(0)
, m_nMax(100)
, m_bInverted(false)
, m_nStep(1)
, m_bRound_step(false)
, m_bJump(false)
, m_bUseCustomThumbs( 0 )
, m_nMajorTicks( 10 )
, m_nMinorTicks( 2 )
, m_nMajorTickSize( 30 )
, m_nMinorTickSize( 20 )
, m_nTickPosition( TOP )
, m_nThickness( 2 )
, m_nSliderType( 0 )
, m_nThumbNumber( 1 )
{
...
}
...
void SliderCtrlX::LeftDown(Point pos, dword keyflags)
{
...
	else if( m_bJump ) 
	{
		m_vValues[0] = ClientToSlider(p);
		WhenSlideFinish();
		UpdateActionRefresh();		
	}
...
}
...

SliderCtrlX&	Jump(bool v = false)	{ m_bJump = v; return *this; }   // Added return *this;

w.DrawImage(max( SliderToClient(m_vValues[i]) - ( ( m_bUseCustomThumbs ? m_vThumbImgs[i].GetSize().cx : m_ThumbImg.GetSize().cx ) >> 1 ), 0),
	m_nThickness + ((size.cy - ( m_bUseCustomThumbs ? m_vThumbImgs[i].GetSize().cy : (m_ThumbImg.GetSize().cy ))) >> 1),   // Added parenthesis
	HasCapture() || HasFocus() ? (m_bUseCustomThumbs ? m_vThumbImgsFocus[i] : m_ThumbImg) : (m_bUseCustomThumbs ? m_vThumbImgs[i] : m_ThumbImg));

m_ThumbImg = SliderThumbsImg::Get(m_nThumbType);