Quick question - lines

[alex_read]

Private Declare Function LineTo Lib "gdi32" _
(ByVal hdc As Long, ByVal x As Long, ByVal y As Long) As Long

Private Sub Form_Load()
    Me.AutoRedraw = True
    LineTo Me.hdc, 200, 200
End Sub

Why will that work, but if I change it to this it doesn't print anything ?

Private Declare Function LineTo Lib "gdi32" _
(ByVal hdc As Long, ByVal x As Long, ByVal y As Long) As Long

Private Sub Form_Load()
    Me.AutoRedraw = True
    LineTo picture1.hdc, 200, 200
End Sub