'宣言 Public Property NodeImageCollapsed As System.Drawing.Image
public System.Drawing.Image NodeImageCollapsed {get; set;}
'宣言 Public Property NodeImageCollapsed As System.Drawing.Image
public System.Drawing.Image NodeImageCollapsed {get; set;}
Setting this property to null resets it and causes the grid to use the default image (a plus sign).
To hide the images, use the Style property.