How to define own message struct?

[Rainer Queck]

Hello NG,

in forme times (decades ago I used to definy my own message structs in
Delphi like this :

TGbReportMessage = packed record
Msg: Cardinal;
Action : Word;
ActionId: Word;
Handle : UINT;
Result: LongInt;
end;

Can I do the same in C# and if yes how?

Thanks for Help
Rainer Queck

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

Hello NG,

in forme times (decades ago I used to definy my own message structs in
Delphi like this :

TGbReportMessage = packed record
Msg: Cardinal;
Action : Word;
ActionId: Word;
Handle : UINT;
Result: LongInt;
end;

Can I do the same in C# and if yes how?

You can use a struct for this.

 

[Rainer Queck]

Hi Ignacio,

You can use a struct for this.

Thanks for responding.

Yes, but can I then typcast a incoming windows message to this struct like I
used to do this in Delphi?

// make sure we process only our messages ....
if aMsg.Msg=FMsgId then
begin
FCurrentMsg := TGbReportMessage(aMsg);

Regards
Rainer

 

[Peter Bradley]

Depends what its type was before you tried to cast it.


Peter

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

Hi Ignacio,

Thanks for responding.

Yes, but can I then typcast a incoming windows message to this struct like
I used to do this in Delphi?

// make sure we process only our messages ....
if aMsg.Msg=FMsgId then
begin
FCurrentMsg := TGbReportMessage(aMsg);

In general no, it depends of the type it was before. You could do something
similar to Delphi if you use an unsafe block.