/// <summary>
/// Returns the coordinates of the edges of a specific window in terms of
/// X from the left and Y from the top of the window.
/// </summary>
/// <param name="windowHandle">Handle to the window of which the client area rectangle should be obtained.</param>
/// <returns></returns>
public static Structures.WinapiRectangle GetClientAreaSize(IntPtr windowHandle)
{
// Obtains the size of the client area.
WindowFunctions.GetClientRect(windowHandle, out Structures.WinapiRectangle clientAreaRectangle);
// Return
return(clientAreaRectangle);
}
/// <summary>
/// Returns the coordinates of the edges of the client area of a specific window
/// relative to the desktop the window is presented on.
/// </summary>
/// <param name="windowHandle">Handle to the window of which the client area rectangle should be obtained.</param>
/// <returns></returns>
public static Structures.WinapiRectangle GetClientRectangle(IntPtr windowHandle)
{
// Obtains the coordinates of the edges of the window.
WindowFunctions.GetClientRect(windowHandle, out Structures.WinapiRectangle clientAreaRectangle);
// Get the coordinates of the top left point on the screen in client's area.
Structures.WinapiPoint topLeftClientCoordinate = new Structures.WinapiPoint();
WindowFunctions.ClientToScreen(windowHandle, ref topLeftClientCoordinate);
// Calculate each edge.
Structures.WinapiRectangle clientArea = new Structures.WinapiRectangle();
clientArea.LeftBorder = topLeftClientCoordinate.x;
clientArea.TopBorder = topLeftClientCoordinate.y;
clientArea.RightBorder = topLeftClientCoordinate.x + clientAreaRectangle.RightBorder;
clientArea.BottomBorder = topLeftClientCoordinate.y + clientAreaRectangle.BottomBorder;
// Return
return(clientArea);
}