LINHA COM COR DIFERENTE NO COMBOBOX - VB6

Option Explicit

Private Type RECT
    Left As Long
    Top As Long
    Right As Long
    Bottom As Long
End Type

Private Type DRAWITEMSTRUCT
    CtlType As Long
    CtlID As Long
    itemID As Long
    itemAction As Long
    itemState As Long
    hwndItem As Long
    hdc As Long
    rcItem As RECT
    itemData As Long
End Type

Private Type CWPSTRUCT
    lParam As Long
    wParam As Long
    message As Long
    hWnd As Long
End Type

Private Type CREATESTRUCT
    lpCreateParams As Long
    hInstance As Long
    hMenu As Long
    hWndParent As Long
    cy As Long
    cx As Long
    y As Long
    x As Long
    style As Long
[ô]These next 2 are Normaly string, but need to be a fixed length
[ô]so we know how long they are when using CopyMemory,
[ô]We[ô]re only interested in the Style property anyway.
    lpszName As Long
    lpszClass As Long
    ExStyle As Long
End Type

Private Declare Sub CopyMemory Lib [Ô]kernel32[Ô] Alias [Ô]RtlMoveMemory[Ô] (Destination As Any, Source As Any, ByVal Length As Long)

Private Declare Function SetWindowLong Lib [Ô]user32[Ô] Alias [Ô]SetWindowLongA[Ô] (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function CallWindowProc Lib [Ô]user32[Ô] Alias [Ô]CallWindowProcA[Ô] (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Function SendMessage Lib [Ô]user32[Ô] Alias [Ô]SendMessageA[Ô] (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function SetBkColor Lib [Ô]gdi32[Ô] (ByVal hdc As Long, ByVal crColor As Long) As Long
Private Declare Function SetTextColor Lib [Ô]gdi32[Ô] (ByVal hdc As Long, ByVal crColor As Long) As Long
Private Declare Function TextOut Lib [Ô]gdi32[Ô] Alias [Ô]TextOutA[Ô] (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal lpString As String, ByVal nCount As Long) As Long
Private Declare Function GetSysColor Lib [Ô]user32[Ô] (ByVal nIndex As Long) As Long
Private Declare Function GetClassName Lib [Ô]user32[Ô] Alias [Ô]GetClassNameA[Ô] (ByVal hWnd As Long, ByVal lpClassName As String, ByVal nMaxCount As Long) As Long
Private Declare Function FillRect Lib [Ô]user32[Ô] (ByVal hdc As Long, lpRect As RECT, ByVal hBrush As Long) As Long
Private Declare Function GetBkColor Lib [Ô]gdi32[Ô] (ByVal hdc As Long) As Long
Private Declare Function GetWindowLong Lib [Ô]user32[Ô] Alias [Ô]GetWindowLongA[Ô] (ByVal hWnd As Long, ByVal nIndex As Long) As Long
Private Declare Function SetWindowsHookEx Lib [Ô]user32[Ô] Alias [Ô]SetWindowsHookExA[Ô] (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Private Declare Function UnhookWindowsHookEx Lib [Ô]user32[Ô] (ByVal hHook As Long) As Long
Private Declare Function CallNextHookEx Lib [Ô]user32[Ô] (ByVal hHook As Long, ByVal ncode As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function CreateSolidBrush Lib [Ô]gdi32[Ô] (ByVal crColor As Long) As Long

Private Const WH_CALLWNDPROC = 4

Private Const CBS_OWNERDRAWVARIABLE = &H20&
Private Const CB_GETLBTEXT = &H148
Private Const CB_SETITEMHEIGHT = &H153

Private Const COLOR_HIGHLIGHT = 13
Private Const COLOR_HIGHLIGHTTEXT = 14
Private Const COLOR_WINDOW = 5
Private Const COLOR_WINDOWTEXT = 8

Private Const GWL_WNDPROC = (-4)
Private Const GWL_STYLE = (-16)

Private Const ODS_SELECTED = &H1

Private Const ODT_COMBOBOX = 3

Private Const WM_CREATE = &H1
Private Const WM_DRAWITEM = &H2B

Private lPrevWndProc As Long
Private lHook As Long
Private lSubCombo As Long

Sub Main()
[ô]The Combobox is a little more tricky to manipulate than a Listbox
[ô]So we need to do a little extra work to make it an [Ô]Owner Drawn[Ô] Control.
    lHook = SetWindowsHookEx(WH_CALLWNDPROC, AddressOf HookApp, App.hInstance, App.ThreadID)
    Form1.Show
[ô]Once the Control. etc are Drawn, we can release the Hook
    Call UnhookWindowsHookEx(lHook)
End Sub

Public Sub SubClassForm(ByVal hWnd As Long)
    lPrevWndProc = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf SubClassedForm)
End Sub

Public Sub RemoveSubClassing(ByVal hWnd As Long)
    Call SetWindowLong(hWnd, GWL_WNDPROC, lPrevWndProc)
End Sub

Public Function SubClassedForm(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    Dim tItem As DRAWITEMSTRUCT
    Dim sItem As String
    Dim lBackBrush As Long

    If Msg = WM_DRAWITEM Then

[ô]This function only passes the Address of the DrawItem Structure, so we need to
[ô]use the CopyMemory API to get a Copy into the Variable we setup:
        Call CopyMemory(tItem, ByVal lParam, Len(tItem))

[ô]If it[ô]s our Combobox..
        If tItem.CtlType = ODT_COMBOBOX Then

[ô]get the Item Text
            sItem = Space(255)
            Call SendMessage(tItem.hwndItem, CB_GETLBTEXT, tItem.itemID, ByVal sItem)
            sItem = Left(sItem, InStr(sItem, Chr(0)) - 1)

[ô]Select the Highlight Colors if this Item is currently selected
            If (tItem.itemState And ODS_SELECTED) Then
                lBackBrush = CreateSolidBrush(GetSysColor(COLOR_HIGHLIGHT))
                Call SetBkColor(tItem.hdc, GetSysColor(COLOR_HIGHLIGHT))
                Call SetTextColor(tItem.hdc, GetSysColor(COLOR_HIGHLIGHTTEXT))
            Else
[ô]Otherwise, use the default Colors
                lBackBrush = CreateSolidBrush(GetSysColor(COLOR_WINDOW))
                Call SetBkColor(tItem.hdc, GetSysColor(COLOR_WINDOW))
                Call SetTextColor(tItem.hdc, tItem.itemData)
            End If

            FillRect tItem.hdc, tItem.rcItem, lBackBrush

[ô]Display the Item
            TextOut tItem.hdc, tItem.rcItem.Left, tItem.rcItem.Top, ByVal sItem, Len(sItem)

[ô]Don[ô]t Return a Value as we[ô]ve dealt with this Message ourselves
            SubClassedForm = 0
            Exit Function
        End If
    End If

[ô]Not our Combobox, so just process the Message as Normal
    SubClassedForm = CallWindowProc(lPrevWndProc, hWnd, Msg, wParam, lParam)
End Function

Private Function HookApp(ByVal lHookID As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

[ô]This Function will get called when Initializing the Form
[ô]We want to Interupt it when it tries to create our Combobox..
    Dim tCWP As CWPSTRUCT
    Dim sClass As String

    Call CopyMemory(tCWP, ByVal lParam, Len(tCWP))

    If tCWP.message = WM_CREATE Then
[ô]get the Control Classname
        sClass = Space(128)
        Call GetClassName(tCWP.hWnd, ByVal sClass, 128)
        sClass = Left(sClass, InStr(sClass, Chr(0)) - 1)
[ô]If it[ô]s our Combobox, Sub-class it to Modify the Create Message..
        If sClass = [Ô]ComboLBox[Ô] Then
            lSubCombo = SetWindowLong(tCWP.hWnd, GWL_WNDPROC, AddressOf SubComboCreate)
        End If
    End If
[ô]Continue the Hook Processing
    HookApp = CallNextHookEx(lHook, lHookID, wParam, ByVal lParam)

End Function

Private Function SubComboCreate(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
[ô]This Function will be called when the Combobox is about to be created
    Dim tCreate As CREATESTRUCT

    If Msg = WM_CREATE Then
[ô]Grab the Data that[ô]s going to be used to Create the Combobox
        Call CopyMemory(tCreate, ByVal lParam, Len(tCreate))
[ô]Alter it, to make the Combobox an [Ô]Owner Drawn[Ô] Control
        tCreate.style = tCreate.style Or CBS_OWNERDRAWVARIABLE
[ô]Copy the modified data back
        Call CopyMemory(ByVal lParam, tCreate, Len(tCreate))
[ô]Alter the Style to OwnerDrawn
        Call SetWindowLong(hWnd, GWL_STYLE, tCreate.style)
[ô]Release this Subclassing Function
        Call SetWindowLong(hWnd, GWL_WNDPROC, lSubCombo)
    End If
[ô]let Windows Process the Modified Data
    SubComboCreate = CallWindowProc(lSubCombo, hWnd, Msg, wParam, lParam)

End Function

SubClassForm hWnd

RemoveSubClassing hWnd

With Combo
.AddItem [Ô]ItemA[Ô]
.AddItem [Ô]ItemB[Ô]
.AddItem [Ô]ItemC na cor vermelha[Ô]
.ItemData(.NewIndex) = vbRed
.Additem [Ô]ItemD[Ô]
.AddItem [Ô]ItemE na cor vermelha[Ô]
.ItemData(.NewIndex) = vbRed
End With