property Items.ItemBackColor(Item as HITEM) as Color

Retrieves or sets a background color for a specific item.

 TypeDescription 
   Item as HITEM A long expression that indicates the item's handle. If the Item is 0, the ItemBackColor changes the background color for all items.  
   Color A color expression that indicates the item's background color. The last 7 bits in the high significant byte of the color to indicates the identifier of the skin being used. Use the Add method to add new skins to the control. If you need to remove the skin appearance from a part of the control you need to reset the last 7 bits in the high significant byte of the color being applied to the background's part.  

Use the CellBackColor property to change the cell's background color. To change the background color of the entire control you can call BackColor property of the control. Use the ClearItemBackColor property to clear the item's background color, after setting using the ItemBackColor property. For instance, you can create a transparent skin and put on the item's background. Use the Add method to add new skins to the control.  Use the ConditionalFormats method to apply formats to a cell or range of cells, and have that formatting change depending on the value of the cell or the value of a formula.

In VB.NET or C# you require the following functions until the .NET framework will provide:

You can use the following VB.NET function:
     Shared Function ToUInt32(ByVal c As Color) As UInt32
         Dim i As Long
	 i = c.R
	 i = i + 256 * c.G
	 i = i + 256 * 256 * c.B
	 ToUInt32 = Convert.ToUInt32(i)
     End Function 
You can use the following C# function:
private UInt32 ToUInt32(Color c)
{
	long i;
	i = c.R;
	i = i + 256 * c.G;
	i = i + 256 * 256 * c.B;
	return Convert.ToUInt32(i);
}

The following C# sample changes the background color for the focused item:

axComboBox1.Items.set_ItemBackColor(axComboBox1.Items.FocusItem, ToUInt32(Color.Red) );

The following VB.NET sample changes the background color for the focused item:

With AxComboBox1.Items
    .ItemBackColor(.FocusItem) = ToUInt32(Color.Red)
End With

The following C++ sample changes the background color for the focused item:

#include "Items.h"
CItems items = m_combobox.GetItems();
items.SetItemBackColor( items.GetFocusItem(), RGB(255,0,0) );

The following VFP sample changes the background color for the focused item:

with thisform.ComboBox1.Items
	.DefaultItem = .FocusItem
	.ItemBackColor( 0 ) = RGB(255,0,0)
endwith

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