See if this example is valid for your comment. I only changed EditBox control for the ActiveX Microsft Forms Control Text that supports UTF-8:
PUBLIC oform1
oform1 = NEWOBJECT("form1")
oform1.SHOW
RETURN
DEFINE CLASS form1 AS FORM
HEIGHT = 517
WIDTH = 698
AUTOCENTER = .T.
CAPTION = "FoxBarcodeQR Demo"
MINHEIGHT = (THIS.HEIGHT)
MINWIDTH = (THIS.WIDTH)
NAME = "Form1"
ADD OBJECT command1 AS COMMANDBUTTON WITH ;
TOP = 468, LEFT = 396, HEIGHT = 27, WIDTH = 132, ;
ANCHOR = 12, CAPTION = "\<Generate QR Code", ;
DEFAULT = .T., TABINDEX = 7, NAME = "Command1"
ADD OBJECT command2 AS COMMANDBUTTON WITH ;
TOP = 468, LEFT = 540, HEIGHT = 27, WIDTH = 132, ;
ANCHOR = 12, CANCEL = .T., CAPTION = "\<Exit", ;
TABINDEX = 8, NAME = "Command2"
ADD OBJECT combo1 AS COMBOBOX WITH ;
ANCHOR = 9, COLUMNCOUNT = 0, COLUMNWIDTHS = "", ;
ROWSOURCETYPE = 1, ROWSOURCE = "2,3,4,5,6,7,8,9,10,11,12", ;
FIRSTELEMENT = 1, HEIGHT = 24, LEFT = 504, NUMBEROFELEMENTS = 0, ;
STYLE = 2, TABINDEX = 4, TOP = 420, WIDTH = 60, NAME = "Combo1"
ADD OBJECT combo2 AS COMBOBOX WITH ;
ANCHOR = 9, BOUNDCOLUMN = 2, COLUMNCOUNT = 2, ;
COLUMNWIDTHS = "60,0", ROWSOURCETYPE = 1, ;
ROWSOURCE = "BMP,0,JPG,1,PNG,2", FIRSTELEMENT = 1, ;
HEIGHT = 24, LEFT = 612, NUMBEROFELEMENTS = 0, ;
STYLE = 2, TABINDEX = 6, TOP = 420, WIDTH = 60, NAME = "Combo2"
ADD OBJECT label1 AS LABEL WITH ;
AUTOSIZE = .T., ANCHOR = 9, BACKSTYLE = 0, ;
CAPTION = "Size", HEIGHT = 17, LEFT = 468, ;
TOP = 420, WIDTH = 25, TABINDEX = 3, NAME = "Label1"
ADD OBJECT label2 AS LABEL WITH ;
AUTOSIZE = .T., ANCHOR = 9, BACKSTYLE = 0, CAPTION = "Type", ;
HEIGHT = 17, LEFT = 576, TOP = 420, WIDTH = 28, ;
TABINDEX = 5, NAME = "Label2"
ADD OBJECT label3 AS LABEL WITH ;
AUTOSIZE = .T., ANCHOR = 9, BACKSTYLE = 0, ;
CAPTION = "Text to encode", HEIGHT = 17, LEFT = 468, ;
TOP = 24, WIDTH = 81, TABINDEX = 1, NAME = "Label3"
ADD OBJECT shape1 AS SHAPE WITH ;
TOP = 24, LEFT = 24, HEIGHT = 420, WIDTH = 420, ;
ANCHOR = 15, BACKCOLOR = RGB(255,255,255), NAME = "Shape1"
ADD OBJECT image1 AS IMAGE WITH ;
ANCHOR = 15, STRETCH = 0, HEIGHT = 396, LEFT = 36, ;
TOP = 36, WIDTH = 396, NAME = "Image1"
ADD OBJECT edit1 AS OLECONTROL WITH ;
TOP = 48, LEFT = 468, HEIGHT = 360, WIDTH = 204, ;
ANCHOR = 9, OLECLASS = "Forms.Textbox.1", NAME = "Edit1"
PROCEDURE INIT
SET PROCEDURE TO LOCFILE("FoxBarcodeQR.prg") ADDITIVE
THIS.ADDPROPERTY("oFbc", NULL)
THIS.oFbc = CREATEOBJECT("FoxBarcodeQR")
THISFORM.Edit1.TEXT = "National characters paste here"
THISFORM.Combo1.LISTINDEX = 5
THISFORM.Combo2.LISTINDEX = 1
LOCAL lcText, lnSize, lnType
m.lcText = ALLTRIM(THISFORM.Edit1.TEXT)
m.lnSize = VAL(THISFORM.Combo1.VALUE)
m.lnType = VAL(THISFORM.Combo2.VALUE)
THISFORM.Image1.PICTURE = THISFORM.oFbc.QRBarcodeImage(m.lcText, , m.lnSize, m.lnType)
ENDPROC
PROCEDURE command1.CLICK
LOCAL lcText, lnSize, lnType
m.lcText = ALLTRIM(THISFORM.Edit1.TEXT)
m.lnSize = VAL(THISFORM.Combo1.VALUE)
m.lnType = VAL(THISFORM.Combo2.VALUE)
THISFORM.Image1.PICTURE = THISFORM.oFbc.QRBarcodeImage(m.lcText, , m.lnSize, m.lnType)
ENDPROC
PROCEDURE command2.CLICK
THISFORM.RELEASE()
ENDPROC
ENDDEFINE