C# Signature:

[DllImport("hhctrl.ocx", SetLastError=true)]
static extern TODO HtmlHelp( IntPtr hWndCaller, string helpFile, UInt32 command, Int32 data );

VB Signature:

<DllImport("hhctrl.ocx", EntryPoint:="HtmlHelp", CharSet:=CharSet.Auto)> _
Function HTMLHelp( _
     ByVal hWndCaller As IntPtr, ByVal pszFile As String, _
     ByVal uCommand As Integer, ByVal dwData As Integer) As Integer
End Function

User-Defined Types:

Public Enum HTMLHelpCommand
     HH_DISPLAY_TOPIC = 0
     HH_DISPLAY_TOC = 1
     HH_DISPLAY_INDEX = 2
     HH_DISPLAY_SEARCH = 3
     HH_HELP_CONTEXT = &HF
     HH_CLOSE_ALL = &H12
End Enum

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

HTMLHelp(Nothing, filePath, HTMLHelpCommand.HH_HELP_CONTEXT, contextID)

or

HTMLHelp(Nothing, filePath, HTMLHelpCommand.HH_DISPLAY_TOC, 0)

Alternative Managed API:

System.Windows.Forms.Help.ShowHelp()

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).