[fpc-pascal] windows.GetProcAddress() vs DynLibs.GetProcAddress()

[Lukasz Sokol]

Hi,

'scue me if I did not catch something, but

On 13/01/14 12:13, Fred van Stappen wrote:
[...]

>> > procedure InitLib(LibFile : PAnsiChar);
>> > begin
>> > LibHandle:=DynLibs.LoadLibrary(libfilename);
>> >   if LibHandle <> DynLibs.NilHandle then
>> >    
>> >     Pointer(soundtouch_createInstance)        := DynLibs.GetProcedureAddress(LibHandle, PAnsiChar('soundtouch_createInstance'));
>> 
/// why not just :

@soundtouch_createInstance := DynLibs.GetProcedureAddress(LibHandle, PAnsiChar('soundtouch_createInstance')); 

(or without the PAnsiChar cast as Michael said:)

@soundtouch_createInstance := DynLibs.GetProcedureAddress(LibHandle, 'soundtouch_createInstance'); 

?


>> Remove the typecast PansiChar()
>> 
>> Michael.
[...]
>  
> What is the value of  Pointer(soundtouch_createInstance) after the above statement ? Is it nil ?
>  
> Michael.
> 
> Thanks for answer Michael.
> 
> Hum, how can i get the value of pointer if the application crash when i do :
> 
>>>  FHandle := soundtouch_createInstance();  
> 
> Maybe, i dont understood your question...
> 

if Assigned(soundtouch_createInstance) then ShowMessage('Got good pointer for soundtouch_createInstance')
else ShowMessage('soundtouch_createInstance not assigned);

placed directly after the GetProcedureAddress call ?