Windows API Guide: StretchBlt Function

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Declare Function WindowFromPoint Lib "user32.dll" (ByVal xPoint As Long, ByVal yPoint As Long) As Long

Platforms: Win 32s, Win 95/98, Win NT

WindowFromPoint determines the handle of the window located at a specific point on the screen. Note that the active window could be a text box, list box, button, or some other object sitting inside a program window. In this case, the handle returned will be to this control and not the program window. If successful, the function returns the handle to the window at that point. If there is no window at that point, or if an error occured, the function instead returns 0.

xPoint

The x-coordinate of the point to look for a window at.

yPoint

The y-coordinate of the point to look for a window at.

Example:

' Display the title bar text of whatever window the mouse ' cursor is currently over.  Note that this could be a control on a program window. Dim mousepos As POINT_TYPE  ' coordinates of the mouse cursor Dim wintext As String, slength As Long  ' receive title bar text and its length Dim hwnd As Long  ' handle to the window found at the point Dim retval As Long  ' return value ' Determine the window the mouse cursor is over. retval = GetCursorPos(mousepos)  ' get the location of the mouse hwnd = WindowFromPoint(mousepos.x, mousepos.y)  ' determine the window that's there If hwnd = 0 Then  ' error or no window at that point   Debug.Print "No window exists at that location."   End End If ' Display that window's title bar text slength = GetWindowTextLength(hwnd)  ' get length of title bar text wintext = Space(slength + 1)  ' make room in the buffer to receive the string slength = GetWindowText(hwnd, wintext, slength + 1)  ' get the text wintext = Left(wintext, slength)  ' extract the returned string from the buffer Debug.Print "Title bar text of the window: "; wintext

Category: Windows

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