Get/SetValue() and other improvements to the native PalmOS controls.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31604 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/palmos/checkbox.cpp

@@ -117,11 +117,12 @@ wxSize wxCheckBox::DoGetBestSize() const
 
 void wxCheckBox::SetValue(bool val)
 {
+    SetBoolValue(val);
 }
 
 bool wxCheckBox::GetValue() const
 {
-    return false;
+    return GetBoolValue();
 }
 
 void wxCheckBox::Command(wxCommandEvent& event)