>>>Maybe I did not explain well, i'm doing like you say and it doesn't work.
>>>
>>>
>>>>Plinio,
>>>>
>>>>The Init event fires only once when control get instaniated.
>>>>You'll have to move your code to the custom method, say SetDaysBold and call it from Init and every other place where month or year changes.
>>>>
>>>>
>>>>
>>
>>Can you provide more details?
>
>
>In my scheduler when form is shown (Init event) I call a method (markday()). In the markday method I mark each day it find from that month in my appoiment table with bald font. Everthing works fine the first time, but when I change the month it does not work (by this time markday method is called from the selchange in the calendar control).

This control doesn't work properly even under VB. See MSKB #Q229063.

There are a few calendar controls presented in Download section of UT.
Maybe one of them can do what you are looking for.