I'm new to MapBasic and am trying to write a small program to enable a
colleague to start using MapInfo for their work. This is my program so
far:
Include "c:\program files\mapinfo\professional\icons.def"
Include "c:\program files\mapinfo\mapbasic\menu.def"
Include "c:\program files\mapinfo\mapbasic\mapbasic.def"
Dim Symbol_type as Symbol
Dim Line_chosen as Integer
Declare Sub Main
Declare Sub Enter_Details
Declare Sub Set_Symbol_Type
Sub Main
Create ButtonPad "X" As
PushButton
ID 501
Icon 42
Calling Enter_Details
End Sub
Sub Enter_Details
Dialog
Title"Title Bar"
Width 150
Height 50
Position 50, 170
Control StaticText
Title "Title Bar"
Position 10, 12
Control PopupMenu
Title "This;That;Then;Now"
Position 50,10
Width 100
Height 20
Control OKButton
Control CancelButton
'**end dialog
If CommandInfo(CMD_INFO_DLG_OK) then
Do Case Symbol_Type
Case "1"
Symbol_type = MakeSymbol (33,red,12)
End Case
End if
End Sub
The program loads into MapInfo okay. Selecting the first option on the
drop-down menu (called First), however, displays the following error
message appears
(mybuttonpad.mb:42) Cannot use an uninitialized symbol variable in an
expression
Can anybody help me with this - I've looked through the manual but can't
seem to pinpoint anything
Regards
Simon
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