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TrackPopupMenu Reference in C#, VB.NET and VB6


Visual Basic 6 definition
Declare Function TrackPopupMenu Lib "user32.dll" (ByVal hMenu As Long, ByVal uFlags As Long, ByVal x As Long, ByVal y As Long, ByVal nReserved As Long, ByVal hWnd As Long, ByVal prcRect As Long) As Long

Visual Basic .NET definition
Declare Function TrackPopupMenu Lib "user32" (ByVal hMenu As Integer, ByVal wFlags As Integer, ByVal x As Integer, ByVal y As Integer, ByVal nReserved As Integer, ByVal hwnd As Integer, ByRef lprc As RECT) As Integer

C# definition
[DllImport("user32")] public static extern int TrackPopupMenu(int hMenu, int wFlags, int x, int y, int nReserved, int hwnd, ref RECT lprc)


TrackPopupMenu displays a popup menu at a specified point. The function also tracks the menu, updating the selection highlight until the user either selects an item or otherwise closes the menu. By default, the function sends a WM_COMMAND message to the parent window, notifying it of the selection. However, flags specified in the uFlags parameter can change this behavior. TrackPopupMenu Displays a shortcut menu at a location and tracks item selection on a menu. System.Windows.Forms.ContextMenu.Show Alphabetical Win32 Category ListHierarchical Win32 Category List Message and Message Queue Functions Win32 function Description .NET Framework API

Return Value

If uFlags contains the TPM_RETURNCMD flag, the function returns the identifier of the menu item that the user selected. If an error occurs or the user does not select an item, the function instead returns 0. If uFlags does not contain the TPM_RETURNCMD flag, the function returns a nonzero value if the function is successful. If an error occured, the function returns 0. Regardless of uFlags, use the GetLastError to get the error code.



Further Information:

For further information on Windows API functions such as these, and how to use these API's in your C# and VB.NET applications, please refer to the book 'Network programming in .NET' (Buy at Amazon UK) (Buy at Amazon US)

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