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CButton::GetCheck 

Retrieves the check state of a radio button or check box.


int GetCheck( ) const;

The return value from a button control created with the BS_AUTOCHECKBOX, BS_AUTORADIOBUTTON, BS_AUTO3STATE, BS_CHECKBOX, BS_RADIOBUTTON, or BS_3STATE style is one of the following values:

Value Meaning

BST_UNCHECKED

Button state is unchecked.

BST_CHECKED

Button state is checked.

BST_INDETERMINATE

Button state is indeterminate (applies only if the button has the BS_3STATE or BS_AUTO3STATE style).

If the button has any other style, the return value is BST_UNCHECKED.

CButton myButton;

// Create an auto 3-state button.
myButton.Create(_T("My button"), WS_CHILD|WS_VISIBLE|BS_AUTO3STATE, 
   CRect(10,10,100,30), pParentWnd, 1);

// Set the check state to the next state 
// (i.e. BST_UNCHECKED changes to BST_CHECKED
// BST_CHECKED changes to BST_INDETERMINATE
// BST_INDETERMINATE changes to BST_UNCHECKED).
myButton.SetCheck( ((myButton.GetCheck()+ 1 ) % 3) );

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