如何在旧版 C++ CLR:syntax 应用程序中创建 KeyUp 事件

Question

I am trying to change a legacy C++ CLR:oldsyntax application to set up an KeyUp event without success.
This is the relevant part of the code:

// declare delegate
__delegate void  KeyUpFuncDelegate(Object */*sender*/, System::Windows::Forms::KeyEventArgs * e);
    
// try to hook up the event
this->SuperMatricula->KeyUp+= KeyEventHandler(this,KeyUpFuncDelegate);

I get the following error:

error C2275: 'GrFingerSampleCPPdotNET2005::FormSup::KeyUpFuncDelegate': illegal use of this type as an expression

Any clue?

Thanks in advance!

Answer 1

I think you just need to change it to delegate and make sure the event uses that delegate. An example ripped out of some of code for comparison.

.h

private ref class StatusMgr sealed
{
public:
    delegate void StatusTextChangedEventHandler( System::Object^ sender, StatusTextChangedEventArgs^ args );

    event StatusTextChangedEventHandler^ StatusTextChanged;

.cpp

statusMgr->StatusTextChanged += 
    gcnew StatusMgr::StatusTextChangedEventHandler( this, &StatusBarTextItem::onStatusTextChanged );