Display correctly special characters in a StringGrid in Linux

[fredycc]

Hello, I compiled a program in Windows, the firts problem was how to display the letter Ñ, then I found in the forum that you can use functions like UFT8Encode & UTF8Decode, this works great, I can pass the SQL sentence with Ñ and then display word with letters like Ñ with any problem. 

After that I try to compile the same application in Linux OpenSuse 11.2 the programs compile without problem but the SQL sentence the letter Ñ appears like #209, when I display all the data from the table the Ñ appears like ?  ; What I need to do for this letters appers correctly in Linux applications? 

I use a database in Firebird 2.1.2, Charset ISO 8859_1. 
Lazarus 0.9.28.2 beta in both Windows Vista & OpenSuse11.2.
I display data in a StringGrid.

Thanks again.

[theo]

In unit LConvEncoding there is a function: ISO_8859_1ToUTF8();

[fredycc]

Thanks Theo, works perfectly, only a last question about it. I try to pass the next query:
Mythread.sqlStr := Format('Select * from cat_mun where cat_mun.nom_mun_ine like %0:s',['''%Ñ%'''])

And nothings return; I check the variable sqlStr & this showme:
Select * from cat_mun where cat_mun.nom_mun_ine like "%'#209'%"

I use UTF8Encode in windows and works fine:
Select * from cat_mun where cat_mun.nom_mun_ine like "%'Ñ'%"

But in linux doesn't works  .

Thanks a lot, Muchas Gracias in Spanish.