Use the ToString method to quick load the items from a formatted string. Use the Template property to load the control's data using the x-script template. The ExecuteTemplate property gets the result after executing a template script. 

The following screen shot shows how the control's WYSWYG editor looks like:

The ToString's syntax in BNF notation:

<TOSTRING> ::= <ITEMS>
<ITEMS> ::= <ITEM>["("<ITEMS>")"][","<ITEMS>]
<ITEM> ::= <NAME>[<OPTIONS>]
<OPTIONS> ::= "["<OPTION>"]"["["<OPTIONS>"]"]
<OPTION> ::= <PROPERTY>["="<VALUE>]
<PROPERTY> ::= "id"|"img"|"bg"|"fg"|"edit"|"sep"|"blt"|"chk"|"dis"|"bld"|"itl"|"stk"|"und"

where the <NAME> is the name of the item. The <VALUE> tag is valid for the options "img","id","bg","fg" and "edit", like follows:

• The <VALUE> tag for "img" option is an integer expression, that indicates the index of the icon being displayed for the item.
• The <VALUE> tag for "id" option is an integer expression, that indicates the identifier of the item.
• The <VALUE> tag for "bg" or "fg" option is a color expression, that indicates the color of the item. The <VALUE> could be a RGB expression ( RGB(RR,GG,BB), where RR is the red value, the GG is the green value, and the BB is the blue value), or a long expression. 
• The <VALUE> tag for "edit" option is a string expression ( without " characters ), that indicates the caption of the edit inside the edit control.
• If the "sep" option is present, the item is a separator item.
• If the "blt" option is present, the item displays a bullet.
• If the "chk" option is present, the item displays a check box.
• If the "dis" option is present, the item is disabled.
• If the "bld" option is present, the item is bolded.
• If the "itl" option is present, the item appears as italic.
• If the "stk" option is present, the item appears as strikeout.
• If the "und" option is present, the item is underlined.

Is there any way to get this formatted string from the control's editor? Open the control in design mode, select the Properties item in its context menu, and locate the Editor page, where you find the "Invoke Internal Editor" button, click it, and the control's Editor page is opened. Build your menu. Click an item, so it becomes focused, and press the CTRL + C, a beep should be hear. Now, open a notepad editor, and press CTRL + V, you should get the formatted string for ToString method. Click the designer, so no item is focused, and press the CTRL + C key, and so the entire menu is copied to the clipboard, as ToString syntax.

For instance, the following formatted string builds the following menu:

A[id=10](B[id=20],C[id=30](D[id=40],E[id=50]),F[id=60])