Posting ini diambil dari Microsoft KB mengenai cara membuat fungsi return DWord dengan menggabungkan HiWord dan LoWord. Adapun fungsi yang
dimaksud adalah sebagai berikut:
Function MakeDWord(LoWord As Integer, HiWord As Integer) As Long
MakeDWord = (HiWord * &H10000) Or (LoWord And &HFFFF&)
End Function
Sedangkan untuk memecah DWord (32 bits) menjadi LoWord (16 bits) dan HiWord (16 bits) adalah sebagai berikut:
Function LoWord(DWord As Long) As Integer
If DWord And &H8000& Then ' &H8000& = &H00008000
LoWord = DWord Or &HFFFF0000
Else
LoWord = DWord And &HFFFF&
End If
End Function
Function HiWord(DWord As Long) As Integer
HiWord = (DWord And &HFFFF0000) \ &H10000
End Function
Sedangkan contoh dari fungsi MakeDword (menggabungkan LoWord dan HiWord) adalah sebagai berikut:
Option Explicit
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Const MK_LBUTTON = &H1
Private Const WM_LBUTTONDOWN = &H201
Function MakeDWord(LoWord As Integer, HiWord As Integer) As Long
MakeDWord = (HiWord * &H10000) Or (LoWord And &HFFFF&)
End Function
Private Sub Form_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
Form1.Cls
Form1.Print "Button Click Event Fired"
Form1.Print "Position X:" & Str$(X / Screen.TwipsPerPixelX)
Form1.Print "Position Y:" & Str$(Y / Screen.TwipsPerPixelY)
End Sub
Private Sub Command1_Click()
Dim nMousePosition As Long
' nMousePosition stores the x (hiword) and y (loword) values
' of the mouse cursor as measured in pixels.
Let nMousePosition = MakeDWord(16, 18)
Call SendMessage(Me.hwnd, WM_LBUTTONDOWN, MK_LBUTTON, nMousePosition)
End Sub
Semoga bermanfaat.
READ MORE - VB6 Code: Membuat DWord dari HiWord + LoWord