ComboBoxExItem 构造函数

 CONSTRUCTOR(
	cItem,
	nItemNumber,
	uRetValue,
	iImageIdx,
	iSelectedIdx,
	iOverlayIdx,
	iIndent
) CLIPPER

[ClipperCallingConventionAttribute(new string[] { ... })]
public ComboBoxExItem(
	__Usual cItem = default,
	__Usual nItemNumber = default,
	__Usual uRetValue = default,
	__Usual iImageIdx = default,
	__Usual iSelectedIdx = default,
	__Usual iOverlayIdx = default,
	__Usual iIndent = default
)