How to update static object on slider movement

See more:

MFC

Hello Everyone,

I want to display the value on the dialog box depending upon the slider position (Slider control). As the slider moves the value should change. For this am using static text tool. I have created int type variable of the static text and am updating it under CustomDraw Event handler. The value is getting updated but it gets overwritten on the previous value. I tried invalidate function too but its not working. Please help me out.
Here the code am using.

void CSensorGain::OnNMCustomdrawSensorgainGapmodeslider(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMCUSTOMDRAW pNMCD = reinterpret_cast<LPNMCUSTOMDRAW>(pNMHDR);
	// TODO: Add your control notification handler code here
	*pResult = 0;
	
	m_GapModeResistanceControl.Invalidate(TRUE);
	m_GapModeResistance = m_GapModeSlider.GetPos();
		
	UpdateData(FALSE);
}