C# Signature:

[DllImport("user32.dll")]
static extern int GetMenuString(IntPtr hMenu, uint uIDItem, [Out,MarshalAs(UnmanagedType.LPStr)] StringBuilder lpString, int nMaxCount, uint uFlag);

User-Defined Types:

Constants used for flags:

internal const UInt32 MF_BYCOMMAND =0x00000000;

internal const UInt32 MF_BYPOSITION =0x00000400;

static extern IntPtr GetMenu(IntPtr hWnd);

Notes:

hMenu

in Handle to the menu.

VB Signature:

<DllImport("user32.dll")> _
Public Shared Function GetMenu(ByVal hWnd As IntPtr) As IntPtr
End Function

uIDItem

in Specifies the menu item to be changed, as determined by the uFlag parameter.

User-Defined Types:

None.

lpString

out Pointer to the buffer that receives the NULL-terminated string. If the string is as long or longer than lpString, the string is truncated and the terminating NULL character is added. If lpString is NULL, the function returns the length of the menu string.

Notes:

None.

nMaxCount

in Specifies the maximum length, in characters, of the string to be copied. If the string is longer than the maximum specified in the nMaxCount parameter, the extra characters are truncated. If nMaxCount is 0, the function returns the length of the menu string.

uFlag

in Specifies how the uIDItem parameter is interpreted. This parameter must be one of the following values.

MF_BYCOMMAND

Indicates that uIDItem gives the identifier of the menu item. If neither the MF_BYCOMMAND nor MF_BYPOSITION flag is specified, the MF_BYCOMMAND flag is the default flag.

MF_BYPOSITION

Indicates that uIDItem gives the zero-based relative position of the menu item.

Tips & Tricks:

Please add some!

Sample Code:

Please add some!

//Delete Menu Item

IntPtr hWnd = FindWindow("WindowClass", "WindowName");

if (hWnd.ToInt32() != 0)

{

   IntPtr hMenu = GetMenu(hWnd);
   if (hMenu.ToInt32() != 0)
   {
      for (uint i = GetMenuItemCount(hMenu) - 1; i >= 0; i--)
      {
         StringBuilder menuName = new StringBuilder(0x20);
         GetMenuString(hMenu, i, menuName, 0x20, MF_BYPOSITION);
         DeleteMenu(hMenu, i, MF_BYPOSITION);
      }
   }

}

Sample Code (C#):

//this.Handle points to the Form (window application project)
int Menu2 = GetMenu(this.Handle.ToInt32());
AppendMenu(Menu2,0xA00,0,null);   // makes a separator
AppendMenu(Menu2,0,777,"Pinvoke Rules!");

Alternative Managed API:

Do you know one? Please contribute it!

Sample Code (VB)

Dim hwndMain as IntPtr = FindWindowEx(intptr.Zero,intptr.Zero,vbNullString,"My Window Title") 'Get the Window Handle
Dim hwndMenu As IntPtr = GetMenu(hwndMain) 'Get the MenuHandle
Dim hwndSubmenu as intptr = GetSubMenu(hwndMenu,1) 'Get the SubMenuHandle to the visible MenuItem, in this case the second one (counting from zero)
Dim intMID as Integer = GetMenuitemID(hwndSubmenu,2)) 'Get the MenuItemID of the third SubMenu under the previous Handle (counting from zero)
Sendmessage(hwndMain, WM_COMMAND, intMID,  0) 'Click the MenuItem!

Alternative Managed API:

Do you know one? Please contribute it!

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