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private: // User declarations
void __fastcall myWindowProc(Messages::TMessage &Message); // 增加
Classes::TWndMethod OldWindowProc; // 增加
void __fastcall TForm3::myWindowProc(Messages::TMessage &Message)
{
if (Message.Msg == WM_LBUTTONUP)
{
static int a = 0;
a++;
if (a % 2 == 0)
Caption = Now();
}
else
OldWindowProc(Message);
}
// ------------------------------------a---------------------------------------
void __fastcall TForm3::FormCreate(TObject *Sender)
{
OldWindowProc = DateTimePicker1->WindowProc;
DateTimePicker1->WindowProc = myWindowProc;
}