Hallo,
dafür gibt's die Message BM_GETCHECK:
Delphi-Quellcode:
case SendMessage(CheckBox1.Handle, BM_GETCHECK, 0, 0) of
BST_CHECKED: ShowMessage('Checked!');
BST_INDETERMINATE: ShowMessage('Indeterminate!');
BST_UNCHECKED: ShowMessage('Unchecked!');
end;
Gruß
xaromz