سعید عزیز این هم مثالی برای استفاده از WindowFromPoint
Private Type POINTAPI
X As Long
Y As Long
End Type
Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Private Declare Function WindowFromPoint Lib "user32" (ByVal xPoint As Long, ByVal yPoint As Long) As Long
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Private Declare Function ExtTextOut Lib "gdi32" Alias "ExtTextOutA" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long, ByVal wOptions As Long, ByVal lpRect As Any, ByVal lpString As String, ByVal nCount As Long, lpDx As Long) As Long
Private Declare Function GetWindowRect Lib "user32" (ByVal hwnd As Long, lpRect As RECT) As Long
Private Declare Function GetTextExtentPoint32 Lib "gdi32" Alias "GetTextExtentPoint32A" (ByVal hdc As Long, ByVal lpsz As String, ByVal cbString As Long, lpSize As POINTAPI) As Long
Private Declare Function GetWindowDC Lib "user32" (ByVal hwnd As Long) As Long
Private Sub Form_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
'KPD-Team 1998
'URL: http://www.allapi.net/
'E-Mail: KPDTeam@Allapi.net
Dim Pt As POINTAPI, mWnd As Long, WR As RECT, nDC As Long
Dim TextSize As POINTAPI, CX As Long, CY As Long
'Get the current cursor position
GetCursorPos Pt
'Get the window under the cursor
mWnd = WindowFromPoint(Pt.X, Pt.Y)
'Get the window's position
GetWindowRect mWnd, WR
'Get the window'zs device context
nDC = GetWindowDC(mWnd)
'Get the height and width of our text
GetTextExtentPoint32 nDC, "Hello !", Len("Hello !"), TextSize
For CX = 1 To WR.Right - WR.Left Step TextSize.X
For CY = 1 To WR.Bottom - WR.Top Step TextSize.Y
'Draw the text on the window
ExtTextOut nDC, CX, CY, 0, ByVal 0&, "Hello !", Len("Hello !"), ByVal 0&
Next
Next
End Sub
Private Sub Form_Paint()
Me.CurrentX = 0
Me.CurrentY = 0
Me.Print "Click on this form," + vbCrLf + "Hold the mouse button," + vbCrLf + "drag the mouse over another window," + vbCrLf + "release the mouse button" + vbCrLf + "and see what happens!"
End Sub
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