CButton::GetCheck函数原型:
intGetCheck()const;返回值:The return value from a button control created with theBS_AUTOCHECKBOX,BS_AUTORADIOBUTTON,BS_AUTO3STATE,BS_CHECKBOX,BS_RADIOBUTTON, orBS_3STATEstyle is one of the following values:
BST_UNCHECKED
Button state is unchecked.
BST_CHECKED
Button state is checked.
BST_INDETERMINATE
Button state is indeterminate (applies only if the button has theBS_3STATEorBS_AUTO3STATEstyle).
例子: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) );