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Button Click -> Execute Help .chm file (VB6)

Posted on 2004-08-20
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Last Modified: 2008-02-01
is there a simple way to open a .chm help file when a button is clicked.  I already have it press F1 for help.

This is in VB6

Thx

JB
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Question by:jamesbenson
3 Comments
 
LVL 85

Accepted Solution

by:
Mike Tomlinson earned 125 total points
ID: 11855761
If you have already set the "Help File Name" property in the Project Properties then it is simple as sending F1 to the application:

Private Sub Command1_Click()
    If App.HelpFile <> "" Then
        SendKeys ("{F1}")
    End If
End Sub

Regards,

Idle_Mind
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LVL 8

Expert Comment

by:mladenovicz
ID: 11858759
HTML Help

Const HH_DISPLAY_TOPIC = &H0
Const HH_SET_WIN_TYPE = &H4
Const HH_GET_WIN_TYPE = &H5
Const HH_GET_WIN_HANDLE = &H6
Const HH_DISPLAY_TEXT_POPUP = &HE   ' Display string resource ID or text in a pop-up window.
Const HH_HELP_CONTEXT = &HF         ' Display mapped numeric value in  dwData.
Const HH_TP_HELP_CONTEXTMENU = &H10 ' Text pop-up help, similar to WinHelp's HELP_CONTEXTMENU.
Const HH_TP_HELP_WM_HELP = &H11     ' text pop-up help, similar to WinHelp's HELP_WM_HELP.
Const HH_CLOSE_ALL = &H12
Private Declare Function HtmlHelp Lib "hhctrl.ocx" Alias "HtmlHelpA" (ByVal hwndCaller As Long, ByVal pszFile As String, ByVal uCommand As Long, ByVal dwData As Long) As Long
Private Sub Form_Load()
    'KPD-Team 2000
    'URL: http://www.allapi.net/
    'E-Mail: KPDTeam@Allapi.net
    Dim hwndHelp As Long
    'The return value is the window handle of the created help window.
    hwndHelp = HtmlHelp(hWnd, "myfile.chm", HH_DISPLAY_TOPIC, 0)
End Sub
Private Sub Form_Unload(Cancel As Integer)
    HtmlHelp Me.hWnd, "", HH_CLOSE_ALL, 0
End Sub

WinHelp

Const HELP_COMMAND = &H102&
Const HELP_CONTENTS = &H3&
Const HELP_CONTEXT = &H1
Const HELP_CONTEXTPOPUP = &H8&
Const HELP_FORCEFILE = &H9&
Const HELP_HELPONHELP = &H4
Const HELP_INDEX = &H3
Const HELP_KEY = &H101
Const HELP_MULTIKEY = &H201&
Const HELP_PARTIALKEY = &H105&
Const HELP_QUIT = &H2
Const HELP_SETCONTENTS = &H5&
Const HELP_SETINDEX = &H5
Const HELP_SETWINPOS = &H203&
Private Declare Function WinHelp Lib "user32.dll" Alias "WinHelpA" (ByVal hWndMain As Long, ByVal lpHelpFile As String, ByVal uCommand As Long, dwData As Any) As Long
Private Sub Form_Load()
    'KPD-Team 2000
    'URL: http://www.allapi.net/
    'E-Mail: KPDTeam@Allapi.net
    WinHelp Me.hwnd, "C:\Windows\help\common.hlp", HELP_CONTENTS, ByVal 0
End Sub
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LVL 2

Expert Comment

by:gerrymcd
ID: 11898002
sub command1_click()
  dim myhelpfile as str
  myhelpfile="c:\helfile.chm"
  call ExecuteFile(myhelpfile)
end sub


Public Sub ExecuteFile(FilePath As String)
'Execute a file
On Error GoTo error
Dim ret As Double
ret = Shell("rundll32.exe url.dll,FileProtocolHandler " & (FilePath), vbNormalFocus)
Exit Sub
error:  Error_Handle Err.Description
End Sub
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