Tab-Item-Colored

#include <FontConstants.au3>
#include <TabConstants.au3>
#include <WinAPI.au3>
#include <GuiConstantsEx.au3>
#include <WindowsConstants.au3>
#include <GuiTab.au3>

Global Const $ODT_TAB        = 101
Global Const $ODS_SELECTED   = 0x0001
Global Const $ODA_DRAWENTIRE = 0x1
Global Const $ODS_FOCUS      = 0x0010

Global $aColTabItem[3][2] = [['Item1',0x11AADD],["Item2",0xEEBB99],["Item3",0x4763FF]] ; [[TabItem-Bezeichnung,TabItem-Color]]
Global $hFont, $iBrush

$hGUI = GUICreate("Draw Tab", 300, 200)
$hTab = GUICtrlCreateTab(10, 10, 280, 180, $TCS_OWNERDRAWFIXED)
$TabItem_1 = GUICtrlCreateTabItem("Item1")
GUICtrlCreateLabel("L1", 10, 33, 277, 155)

$TabItem_2 = GUICtrlCreateTabItem("Item2")
GUICtrlCreateLabel("L2", 10, 33, 277, 155)

$TabItem_2 = GUICtrlCreateTabItem("Item3")
GUICtrlCreateLabel("L3", 10, 33, 277, 155)
GUICtrlCreateTabItem("")

GUISetState()

GUIRegisterMsg($WM_DRAWITEM, "WM_DRAWITEM")

_GUICtrlTab_SetCurSel($hTab, 2)
_GUICtrlTab_SetCurSel($hTab, 1)
_GUICtrlTab_SetCurSel($hTab, 0)
_GUICtrlTab_SetCurFocus($hTab, 1)

Do
Until GUIGetMsg() = -3
_WinAPI_DeleteObject($hFont)
_WinAPI_DeleteObject($iBrush)

Func WM_DRAWITEM($hWnd, $Msg, $wParam, $lParam)
    Local $DRAWITEMSTRUCT = DllStructCreate("uint cType;uint cID;uint itmID;uint itmAction;uint itmState;" & _
                            "hwnd hItm;hwnd hDC;dword itmRect[4];dword itmData", $lParam)
    If DllStructGetData($DRAWITEMSTRUCT, "cType") <> $ODT_TAB Then Return $GUI_RUNDEFMSG
    If DllStructGetData($DRAWITEMSTRUCT, "itmAction") <> $ODA_DRAWENTIRE Then Return $GUI_RUNDEFMSG
    Local $itmID = DllStructGetData($DRAWITEMSTRUCT, "itmID")

    Local $hDC   = DllStructGetData($DRAWITEMSTRUCT, "hDC")
    Local $hItm  = DllStructGetData($DRAWITEMSTRUCT, "hItm")

    Local $itmText = $aColTabItem[$itmID][0], $iBrushColor = $aColTabItem[$itmID][1]

    DLLCall("gdi32.dll","int","SetBkMode", "hwnd", $hDC, "int", 1)

    Local $iBrush = DLLCall("gdi32.dll","hwnd","CreateSolidBrush", "int", $iBrushColor)
    $iBrush = $iBrush[0]

    Local $iBrushOld = _WinAPI_SelectObject($hDC, $iBrush)
    DLLCall("user32.dll","int","FillRect", "hwnd", $hDC, "ptr", DllStructGetPtr($DRAWITEMSTRUCT, "itmRect"), "hwnd", $iBrush)
    Local $tBuffer = DllStructCreate("char[256]")
    DllStructSetData($tBuffer, 1, $itmText)
    $itmText = DllStructGetData($tBuffer, 1)

    DllStructSetData($DRAWITEMSTRUCT, "itmRect", DllStructGetData($DRAWITEMSTRUCT, "itmRect", 1) + 10, 1)
    DllStructSetData($DRAWITEMSTRUCT, "itmRect", DllStructGetData($DRAWITEMSTRUCT, "itmRect", 2) + 5, 2)

    DllCall("user32.dll", "int", "DrawText", "hwnd", $hDC, "str", $itmText, "int", StringLen($itmText), _
            "ptr", DllStructGetPtr($DRAWITEMSTRUCT, "itmRect"), "int", $DT_LEFT)
    Return $GUI_RUNDEFMSG
EndFunc