Hi IBOX ,

Keep your webblock inside a div and bind the display property of the div with a boolean variable . Now you can check the visibility of your webblock by that variable.

Also with webblock there is no property like enable\disable , you can have this property for most of the controls like Input box , Dropdown, Checkbox etc which you can control by binding the Enabled property with variables.

Please let me know if you need additional information or your case is different from what i expalined.

Regards,

-PJ-

Pramod  Already provided answer but just want to add one thing: 

If you want to enable/disable a widget which doesnot have default enabled/disable property you can put in container and add a clsss with if condition based on Boolean parameter.

@Abdul quadir Saifee , Solution already provided  by @Pramod Jain. he is already mention this condition.