Hi...I Have A Tabcontrol Containing Many Controls ,Each Tabpage Inside The Tabcontrol Have Checkboxes And I Have A Select All Checkbox Outside The Tabcontrol .I Need All The Checkboxes To Get...

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C#3.5

i have a tabcontrol containing many controls ,each tabpage inside the tabcontrol have checkboxes and i have a select all checkbox outside the tabcontrol .I need all the checkboxes to get checked when i check the selectalll checkboxesAs many checboxes are dynamically made visible/invisible i have adde a condition if the checkbox is visible then the checked stat can be changed but when i select a tabpag only the ones visible in that page are selected when i switch to the other tab the checkboxes are not selected

private void SelectAllChkBx(bool flagset)
       {
           if (this.checkbox1.Visible == true)
               this.checkbox1.Checked = flagset;
if (this.checkbox2.Visible == true)
               this.checkbox2.Checked = flagset;
if (this.checkbox3.Visible == true)
               this.checkbox3.Checked = flagset;
if (this.checkbox4.Visible == true)
               this.checkbox4.Checked = flagset;
       }