WindowHitTestRegions (Enums)
Last changed: Carter N-108.172.185.64

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Summary
The return value of the DefWindowProc function, indicating the position of the cursor hot spot. These values can also be used within WndProc(ref Message) implementations when authoring classes that inherit from Control or Form objects in .NET WinForms applications.

C# Definition:

/// <summary>
/// SOURCE: https://docs.microsoft.com/en-us/windows/win32/inputdev/wm-nchittest#return-value
/// The return value of the DefWindowProc function, or the Message.Result value used in a WndProc(ref Message) method of a .NET WinForms Form object, is one of the following values, indicating the position of the cursor hot spot.
/// </summary>
enum  WindowHitTestRegions {
   /// <summary>In the border of a window that does not have a sizing border.</summary>
    HTBORDER = 18,
    /// <summary>In the lower-horizontal border of a resizable window (the user can click the mouse to resize the window vertically).</summary>
    HTBOTTOM = 15,
    /// <summary>In the lower-left corner of a border of a resizable window (the user can click the mouse to resize the window diagonally).</summary>
    HTBOTTOMLEFT = 16,
    /// <summary>In the lower-right corner of a border of a resizable window (the user can click the mouse to resize the window diagonally).</summary>
    HTBOTTOMRIGHT = 17,
    /// <summary>In a title bar.</summary>
    HTCAPTION = 2,
    /// <summary>In a client area.</summary>
    HTCLIENT = 1,
    /// <summary>In a Close button.</summary>
    HTCLOSE = 20,
    /// <summary>On the screen background or on a dividing line between windows (same as HTNOWHERE, except that the DefWindowProc function produces a system beep to indicate an error).</summary>
    HTERROR = -2,
    /// <summary>In a size box (same as HTSIZE).</summary>
    HTGROWBOX = 4,
    /// <summary>In a Help button.</summary>
    HTHELP = 21,
    /// <summary>In a horizontal scroll bar.</summary>
    HTHSCROLL = 6,
    /// <summary>In the left border of a resizable window (the user can click the mouse to resize the window horizontally).</summary>
    HTLEFT = 10,
    /// <summary>In a menu.</summary>
    HTMENU = 5,
    /// <summary>In a Maximize button.</summary>
    HTMAXBUTTON = 9,
    /// <summary>In a Minimize button.</summary>
    HTMINBUTTON = 8,
    /// <summary>On the screen background or on a dividing line between windows.</summary>
    HTNOWHERE = 0,
    /// <summary>In a Minimize button.</summary>
    HTREDUCE = 8,
    /// <summary>In the right border of a resizable window (the user can click the mouse to resize the window horizontally).</summary>
    HTRIGHT = 11,
    /// <summary>In a size box (same as HTGROWBOX).</summary>
    HTSIZE = 4,
    /// <summary>In a window menu or in a Close button in a child window.</summary>
    HTSYSMENU = 3,
    /// <summary>In the upper-horizontal border of a window.</summary>
    HTTOP = 12,
    /// <summary>In the upper-left corner of a window border.</summary>
    HTTOPLEFT = 13,
    /// <summary>In the upper-right corner of a window border.</summary>
    HTTOPRIGHT = 14,
    /// <summary>In a window currently covered by another window in the same thread (the message will be sent to underlying windows in the same thread until one of them returns a code that is not HTTRANSPARENT).</summary>
    HTTRANSPARENT = -1,
    /// <summary>In the vertical scroll bar.</summary>
    HTVSCROLL = 7,
    /// <summary>In a Maximize button.</summary>
    HTZOOM = 9,
}

VB Definition:

Enum  WindowHitTestRegions
   TODO
End Enum

Notes:

None.

Documentation