Option Explicit
 
Private Sub Form_Load()
  Call SetWindowPos(Me.hwnd, -1, 0, 0, 0, 0, &H2 Or &H1)
  AutoRedraw = True
  FontBold = True
  BackColor = &HAA431B
  ForeColor = vbWhite
  StartHook
End Sub
 
Private Sub Form_Unload(Cancel As Integer)
  StopHook
End Sub
 
 

 
Option Explicit
 
Private Declare Function SetWindowsHookEx Lib "user32.dll" Alias "SetWindowsHookExA" (ByVal idHook As Long, ByVal lpfn As Long, ByVal hmod As Long, ByVal dwThreadId As Long) As Long
Private Declare Function UnhookWindowsHookEx Lib "user32.dll" (ByVal hHook As Long) As Long
Private Declare Function CallNextHookEx Lib "user32" (ByVal hHook As Long, ByVal ncode As Long, ByVal wParam As Long, lParam As Any) As Long
Private Declare Function GetWindowDC Lib "user32" (ByVal hwnd As Long) As Long
Public Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
 
Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long) As Long
Private Declare Function ReleaseDC Lib "user32.dll" (ByVal hwnd As Long, ByVal hdc As Long) As Long
 
Private Const WH_MOUSE_LL As Long = 14
 
Private Type POINTAPI: x As Long: y As Long: End Type
 
Dim hHook As Long
Dim lDC As Long
 
Public Sub StartHook()
    hHook = SetWindowsHookEx(WH_MOUSE_LL, AddressOf MouseProc, App.hInstance, &H0&)
    lDC = GetWindowDC(&H0&)
End Sub
 
 
Public Sub StopHook()
    Call UnhookWindowsHookEx(hHook)
    hHook = &H0&
    Call ReleaseDC(&H0&, lDC)
End Sub
 
 
Private Function MouseProc(ByVal ncode As Long, ByVal wParam As Long, lParam As POINTAPI) As Long
 
    Dim lColor As Long
    lColor = GetPixel(lDC, lParam.x, lParam.y)
 
    'If Not lColor < 0 Then
      'Form1.Cls
      'Form1.Print Hex(lColor)
      If lColor = &HAA431B Then
        Form1.Caption = "SI"
      Else
        Form1.Caption = "NO"
      End If
    'End If
 
  MouseProc = CallNextHookEx(hHook, ncode, wParam, lParam)
 
End Function
 
 
 
 

Option Explicit
'Autor: Leandro Ascierto
'Web: http://leandroascierto.com/blog/
Private Declare Function CreateDIBSection Lib "gdi32" (ByVal hDC As Long, pBitmapInfo As BITMAPINFO, ByVal un As Long, lplpVoid As Long, ByVal handle As Long, ByVal dw As Long) As Long
Private Declare Function GetDC Lib "user32" (ByVal hWnd As Long) As Long
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hDC As Long) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hWnd As Long, ByVal hDC As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hDC As Long, ByVal hObject As Long) As Long
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hDC As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Function VarPtrArray Lib "msvbvm60.dll" Alias "VarPtr" (Ptr() As Any) As Long
Private Declare Function OleTranslateColor Lib "oleaut32.dll" (ByVal lOleColor As Long, ByVal lHPalette As Long, ByVal lColorRef As Long) As Long
Private Declare Function SetCursorPos Lib "user32.dll" (ByVal x As Long, ByVal y As Long) As Long
 
Private Type RGBQUAD
    rgbBlue As Byte
    rgbGreen As Byte
    rgbRed As Byte
    rgbReserved As Byte
End Type
 
Private Type BITMAPINFOHEADER
    biSize As Long
    biWidth As Long
    biHeight As Long
    biPlanes As Integer
    biBitCount As Integer
    biCompression As Long
    biSizeImage As Long
    biXPelsPerMeter As Long
    biYPelsPerMeter As Long
    biClrUsed As Long
    biClrImportant As Long
End Type
 
Private Type BITMAPINFO
    bmiHeader As BITMAPINFOHEADER
    bmiColors As RGBQUAD
End Type
 
Private Type SAFEARRAYBOUND
    cElements As Long
    lLbound As Long
End Type
 
Private Type SAFEARRAY2D
    cDims As Integer
    fFeatures As Integer
    cbElements As Long
    cLocks As Long
    pvData As Long
    Bounds(0 To 1) As SAFEARRAYBOUND
End Type
 
Private Type POINTAPI
    x As Long
    y As Long
End Type
 
Private Const DIB_RGB_COLORS = 0
Private Const BI_RGB = 0&
 
 
Private Function FindColorInScreen(ByVal oColor As OLE_COLOR, ByRef PT() As POINTAPI) As Long
    Dim ScreenDC As Long
    Dim TmpDC As Long
    Dim hBmp As Long
    Dim OldBmp As Long
    Dim Addrs As Long
    Dim x As Long
    Dim y As Long
    Dim lpBits() As Long
    Dim BI As BITMAPINFO
    Dim SA As SAFEARRAY2D
    Dim W As Long, H As Long
    Dim lColor As Long
 
    W = Screen.Width / Screen.TwipsPerPixelX
    H = Screen.Height / Screen.TwipsPerPixelY
 
    With BI.bmiHeader
        .biSize = Len(BI.bmiHeader)
        .biWidth = W
        .biHeight = H
        .biPlanes = 1
        .biBitCount = 32
        .biCompression = BI_RGB
        .biSizeImage = AlignScan(.biWidth, .biBitCount) * .biHeight
    End With
 
    ScreenDC = GetDC(0)
    TmpDC = CreateCompatibleDC(ScreenDC)
    hBmp = CreateDIBSection(ScreenDC, BI, DIB_RGB_COLORS, Addrs, 0, 0)
 
    OldBmp = SelectObject(TmpDC, hBmp)
 
    Call BitBlt(TmpDC, 0, 0, W, H, ScreenDC, 0, 0, vbSrcCopy)
 
    Call ReleaseDC(0&, ScreenDC)
 
    With SA
        .cbElements = 4
        .cDims = 2
        .Bounds(0).lLbound = 0
        .Bounds(0).cElements = H
        .Bounds(1).lLbound = 0
        .Bounds(1).cElements = (BI.bmiHeader.biSizeImage \ .Bounds(0).cElements) \ 4
        .pvData = Addrs
    End With
 
    CopyMemory ByVal VarPtrArray(lpBits), VarPtr(SA), 4
 
    ReDim PT(0)
 
    lColor = ConvertColor(oColor)
 
    For y = H - 1 To 0 Step -1
        For x = 0 To W - 1
            If lpBits(x, y) = lColor Then
                ReDim Preserve PT(FindColorInScreen)
                With PT(FindColorInScreen)
                    .x = x
                    .y = H - y
                End With
                FindColorInScreen = FindColorInScreen + 1
            End If
        Next
    Next
 
    CopyMemory ByVal VarPtrArray(lpBits), 0&, 4
    Call DeleteObject(SelectObject(TmpDC, OldBmp))
    Call DeleteDC(TmpDC)
End Function
 
Private Function AlignScan(ByVal inWidth As Long, ByVal inDepth As Integer) As Long
    AlignScan = (((inWidth * inDepth) + &H1F) And Not &H1F&) \ &H8
End Function
 
Private Function ConvertColor(oColor As OLE_COLOR) As Long
    Dim RGBA(0 To 3) As Byte
    Dim BGRA(0 To 3) As Byte
    OleTranslateColor oColor, 0, VarPtr(RGBA(0))
    BGRA(0) = RGBA(2)
    BGRA(1) = RGBA(1)
    BGRA(2) = RGBA(0)
    BGRA(3) = &HFF
    CopyMemory ConvertColor, BGRA(0), 4&
End Function
 
Private Sub Form_Load()
    Dim lCount As Long
    Dim PT() As POINTAPI
    Me.AutoRedraw = True
    lCount = FindColorInScreen(vbBlue, PT)
    If lCount > 0 Then
        SetCursorPos PT(0).x, PT(0).y
        Dim i As Long
        For i = 0 To lCount - 1
            Debug.Print PT(i).x, PT(i).y
        Next
    End If
End Sub