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  Visual Basic    (ActiveX/Controles/DLL)

Título da Dica:  ToolTip estilo Windows XP
Postada em 27/9/2004 por Brexuega            
Crie um projecto Standard
Adicione uma class e de-lhe o nome de CBalloonToolTip
Adicione 2 textbox e um command button ao form1

Coloque o seguinte codigo no form1:
---------------------------------------------------------------------------------------------------
Dim TT1 As New CBalloonToolTip                            '//Demo for On Demand tooltip
Dim TT2 As New CBalloonToolTip                            '//Demo for mouse over tooltip

Private Declare Function GetKeyState Lib "user32" (ByVal nVirtKey As Long) As Integer

Public Function CapsLockOn() As Boolean
   Dim iKeyState As Integer
   iKeyState = GetKeyState(vbKeyCapital)
   CapsLockOn = (iKeyState = 1 Or iKeyState = -127)
End Function

Private Sub Command1_Click()
   If Text1.Text <> "mypassword" Then
       TT1.Style = TTBalloon
       TT1.Icon = TTIconError
       TT1.Title = IIf(Text1.Text = "", "Blank Password", "Invalid Password")
       TT1.TipText = "Please Enter Correct Password..."
       TT1.PopupOnDemand = True
       TT1.CreateToolTip Text1.hwnd
       TT1.Show 0, Text1.Height / Screen.TwipsPerPixelX - 1    '//In Pixel only
    End If
End Sub

Private Sub Form_Load()
   TT2.Style = TTBalloon
   TT2.Icon = TTIconInfo
   TT2.Title = "Information"
   TT2.TipText = "A little cute tooltip for Textbox2"
   TT2.PopupOnDemand = False
   TT2.ForeColor = vbWhite
   TT2.BackColor = &HCE7110
   TT2.VisibleTime = 6000                                'After 6 Seconds tooltip will go away
    TT2.CreateToolTip Text2.hwnd
End Sub

Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
   TT1.Destroy
End Sub

Private Sub Form_Paint()
   TT1.Destroy
End Sub

Private Sub Form_Resize()
   TT1.Destroy
End Sub
Private Sub Form_Unload(Cancel As Integer)
   TT1.Destroy
   TT2.Destroy
End Sub

Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)
   If CapsLockOn Then
       TT1.Style = TTBalloon
       TT1.Icon = TTIconWarning
       TT1.Title = "Caps Lock is on"
       TT1.TipText = "Check your caps lock key..."
       TT1.CreateToolTip Text1.hwnd
       TT1.Show 0, Text1.Height / Screen.TwipsPerPixelX - 1
   Else
       TT1.Destroy
   End If
End Sub

Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
   TT1.Destroy
End Sub
---------------------------------------------------------------------------------------------------

coloque o seguinte codigo na class:
---------------------------------------------------------------------------------------------------
Option Explicit

Private Declare Sub InitCommonControls Lib "comctl32.dll" ()

''Windows API Functions
Private Declare Function CreateWindowEx Lib "user32.dll" Alias "CreateWindowExA" ( _
       ByVal dwExStyle As Long, _
       ByVal lpClassName As String, _
       ByVal lpWindowName As String, _
       ByVal dwStyle As Long, _
       ByVal X As Long, _
       ByVal Y As Long, _
       ByVal nWidth As Long, _
       ByVal nHeight As Long, _
       ByVal hWndParent As Long, _
       ByVal hMenu As Long, _
       ByVal hInstance As Long, _
       ByRef lpParam As Any) As Long

Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" ( _
       ByVal hwnd As Long, _
       ByVal wMsg As Long, _
       ByVal wParam As Long, _
       ByRef lParam As Any) As Long

Private Declare Function SendMessageLong Lib "user32" Alias "SendMessageA" ( _
       ByVal hwnd As Long, _
       ByVal wMsg As Long, _
       ByVal wParam As Long, _
       ByVal lParam As Long) As Long

Private Declare Function DestroyWindow Lib "user32" ( _
       ByVal hwnd As Long) As Long

Private Declare Function ClientToScreen Lib "user32" ( _
       ByVal hwnd As Long, _
       lpPoint As POINTAPI) As Long

''Windows API Constants
Private Const WM_USER = &H400
Private Const CW_USEDEFAULT = &H80000000

''Windows API Types
Private Type RECT
   left As Long
   top As Long
   right As Long
   bottom As Long
End Type

Private Type POINTAPI
   X As Long
   Y As Long
End Type

'Tooltip Window Constants
Private Const TTS_NOPREFIX = &H2
Private Const TTF_TRANSPARENT = &H100
Private Const TTF_CENTERTIP = &H2
Private Const TTM_ADDTOOLA = (WM_USER + 4)
Private Const TTM_ACTIVATE = WM_USER + 1
Private Const TTM_UPDATETIPTEXTA = (WM_USER + 12)
Private Const TTM_SETMAXTIPWIDTH = (WM_USER + 24)
Private Const TTM_SETTIPBKCOLOR = (WM_USER + 19)
Private Const TTM_SETTIPTEXTCOLOR = (WM_USER + 20)
Private Const TTM_SETTITLE = (WM_USER + 32)
Private Const TTS_BALLOON = &H40
Private Const TTS_ALWAYSTIP = &H1
Private Const TTF_SUBCLASS = &H10
Private Const TTF_TRACK = &H20
Private Const TTF_IDISHWND = &H1
Private Const TTM_SETDELAYTIME = (WM_USER + 3)
Private Const TTDT_AUTOPOP = 2
Private Const TTDT_INITIAL = 3
Private Const TTM_TRACKACTIVATE = WM_USER + 17
Private Const TTM_TRACKPOSITION = WM_USER + 18
Private Const WS_POPUP = &H80000000

Private Const TOOLTIPS_CLASSA = "tooltips_class32"

''Tooltip Window Types
Private Type TOOLINFO
   lSize As Long
   lFlags As Long
   hwnd As Long
   lId As Long
   lpRect As RECT
   hInstance As Long
   lpStr As String
   lParam As Long
End Type


Public Enum ttIconType
   TTNoIcon = 0
   TTIconInfo = 1
   TTIconWarning = 2
   TTIconError = 3
End Enum

Public Enum ttStyleEnum
   TTStandard
   TTBalloon
End Enum

'local variable(s) to hold property value(s)
Private mvarBackColor As Long
Private mvarTitle As String
Private mvarForeColor As Long
Private mvarIcon As ttIconType
Private mvarCentered As Boolean
Private mvarStyle As ttStyleEnum
Private mvarTipText As String
Private mvarVisibleTime As Long
Private mvarDelayTime As Long
Private mvarPopupOnDemand As Boolean

'private data
Private m_lTTHwnd As Long                                  ' hwnd of the tooltip
Private m_lParentHwnd As Long                              ' hwnd of the window the tooltip attached to
Private ti As TOOLINFO

Private Sub Class_Initialize()
   InitCommonControls
   mvarDelayTime = 500
   mvarVisibleTime = 5000
   mvarPopupOnDemand = False
End Sub
Private Sub Class_Terminate()
   Destroy
End Sub
'//////////////////////////////////////////////////////
Public Property Get VisibleTime() As Long
   VisibleTime = mvarVisibleTime
End Property
Public Property Let VisibleTime(ByVal lData As Long)
   mvarVisibleTime = lData
End Property
'//////////////////////////////////////////////////////
Public Property Get DelayTime() As Long
   DelayTime = mvarDelayTime
End Property
Public Property Let DelayTime(ByVal lData As Long)
   mvarDelayTime = lData
End Property
'//////////////////////////////////////////////////////
Public Property Let Icon(ByVal vData As ttIconType)
   mvarIcon = vData
   If m_lTTHwnd <> 0 And mvarTitle <> Empty And mvarIcon <> TTNoIcon Then
       SendMessage m_lTTHwnd, TTM_SETTITLE, CLng(mvarIcon), ByVal mvarTitle
   End If
End Property
Public Property Get Icon() As ttIconType
   Icon = mvarIcon
End Property
'//////////////////////////////////////////////////////
Public Property Let ForeColor(ByVal vData As Long)
   mvarForeColor = vData
   If m_lTTHwnd <> 0 Then
       SendMessage m_lTTHwnd, TTM_SETTIPTEXTCOLOR, mvarForeColor, 0&
   End If
End Property
Public Property Get ForeColor() As Long
   ForeColor = mvarForeColor
End Property
'//////////////////////////////////////////////////////
Public Property Let Title(ByVal vData As String)
   mvarTitle = vData
   If m_lTTHwnd <> 0 And mvarTitle <> Empty And mvarIcon <> TTNoIcon Then
       SendMessage m_lTTHwnd, TTM_SETTITLE, CLng(mvarIcon), ByVal mvarTitle
   End If
End Property
Public Property Get Title() As String
   Title = ti.lpStr
End Property
'//////////////////////////////////////////////////////
Public Property Let PopupOnDemand(ByVal vData As Boolean)
   mvarPopupOnDemand = vData
   'If m_lTTHwnd <> 0 Then
    'End If
End Property
Public Property Get PopupOnDemand() As Boolean
   PopupOnDemand = mvarPopupOnDemand
End Property
'//////////////////////////////////////////////////////
Public Property Let BackColor(ByVal vData As Long)
   mvarBackColor = vData
   If m_lTTHwnd <> 0 Then
       SendMessage m_lTTHwnd, TTM_SETTIPBKCOLOR, mvarBackColor, 0&
   End If
End Property
Public Property Get BackColor() As Long
   BackColor = mvarBackColor
End Property
'//////////////////////////////////////////////////////
Public Property Let TipText(ByVal vData As String)
   mvarTipText = vData
   ti.lpStr = vData
   If m_lTTHwnd <> 0 Then
       SendMessage m_lTTHwnd, TTM_UPDATETIPTEXTA, 0&, ti
   End If
End Property
Public Property Get TipText() As String
   TipText = mvarTipText
End Property
'//////////////////////////////////////////////////////
Public Property Let Style(ByVal vData As ttStyleEnum)
   mvarStyle = vData
End Property
Public Property Get Style() As ttStyleEnum
   Style = mvarStyle
End Property
'//////////////////////////////////////////////////////
Public Property Let Centered(ByVal vData As Boolean)
   mvarCentered = vData
End Property
Public Property Get Centered() As Boolean
   Centered = mvarCentered
End Property

'X and Y are in Pixel so dont send vbTwips value
Public Sub Show(Optional X As Long = 0, Optional Y As Long = 0)

   Dim pt As POINTAPI
   Dim ptTip As Long
   Dim ret As Long

   With pt
       .X = X
       .Y = Y
   End With

   ret = ClientToScreen(Form1.Text1.hwnd, pt)

   ptTip = pt.Y * &H10000
   ptTip = ptTip + pt.X

   ' These two messages will set the position of the tooltip:
    ret = SendMessage(m_lTTHwnd, TTM_TRACKPOSITION, 0, ByVal ptTip)
   ret = SendMessage(m_lTTHwnd, TTM_TRACKACTIVATE, True, ti)

End Sub
Public Function CreateToolTip(ByVal ParentHwnd As Long) As Boolean
   Dim lWinStyle As Long
   If m_lTTHwnd <> 0 Then
       DestroyWindow m_lTTHwnd
   End If
   m_lParentHwnd = ParentHwnd

   ''create baloon style if desired
    If mvarStyle = TTBalloon Then lWinStyle = lWinStyle Or TTS_BALLOON

   m_lTTHwnd = CreateWindowEx(0&, _
           TOOLTIPS_CLASSA, _
           vbNullString, _
           lWinStyle, _
           0&, _
           0&, _
           0&, _
           0&, _
           m_lParentHwnd, _
           0&, _
           0&, _
           0&)

   ''now set our tooltip info structure
    With ti
       '//dont incude TTF_SUBCLASS for on demand
        ''if we want it centered, then set that flag
        If mvarCentered Then
           If mvarPopupOnDemand = False Then
               .lFlags = TTF_SUBCLASS Or TTF_CENTERTIP Or TTF_IDISHWND
           Else
               .lFlags = TTF_IDISHWND Or TTF_TRACK Or TTF_CENTERTIP
           End If
       Else
           If mvarPopupOnDemand = False Then
               .lFlags = TTF_SUBCLASS Or TTF_IDISHWND
           Else
               .lFlags = TTF_IDISHWND Or TTF_TRACK Or TTF_TRANSPARENT
           End If
       End If

       'set the hwnd prop to our parent control's hwnd
        .hwnd = m_lParentHwnd
       .lId = m_lParentHwnd                              '0
        .hInstance = App.hInstance
       '.lpstr = ALREADY SET
        '.lpRect = lpRect
        .lSize = Len(ti)
   End With

   ''add the tooltip structure
    SendMessage m_lTTHwnd, TTM_ADDTOOLA, 0&, ti

   ''if we want a title or we want an icon
    If mvarTitle <> vbNullString Or mvarIcon <> TTNoIcon Then
       SendMessage m_lTTHwnd, TTM_SETTITLE, CLng(mvarIcon), ByVal mvarTitle
   End If

   If mvarForeColor <> Empty Then
       SendMessage m_lTTHwnd, TTM_SETTIPTEXTCOLOR, mvarForeColor, 0&
   End If

   If mvarBackColor <> Empty Then
       SendMessage m_lTTHwnd, TTM_SETTIPBKCOLOR, mvarBackColor, 0&
   End If

   SendMessageLong m_lTTHwnd, TTM_SETDELAYTIME, TTDT_AUTOPOP, mvarVisibleTime
   SendMessageLong m_lTTHwnd, TTM_SETDELAYTIME, TTDT_INITIAL, mvarDelayTime

End Function

Public Sub Destroy()
   If m_lTTHwnd <> 0 Then
       DestroyWindow m_lTTHwnd
   End If
End Sub
---------------------------------------------------------------------------------------------------

Fonte: http://www.codeproject.com/
Créditos: Nayan Patel

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