FileToolTipAction - делегат

public delegate void FileToolTipAction(
	IFileViewModel viewModel,
	IFileToolTip toolTip
)

Public Delegate Sub FileToolTipAction ( 
	viewModel As IFileViewModel,
	toolTip As IFileToolTip
)

public delegate void FileToolTipAction(
	IFileViewModel^ viewModel, 
	IFileToolTip^ toolTip
)

type FileToolTipAction = 
    delegate of 
        viewModel : IFileViewModel * 
        toolTip : IFileToolTip -> unit