| Visual Basic | Jabaco Support | Specifics... |
| abs | Exact | |
| addressof | ||
| and | Refer to operators | |
| app | None | Version 1.5.2 App.Path causes Unhandled Null Exception App.EXEName returns nothing |
| array | None | Not supported. In VB, the Array function can be used to create arrays in variant variables. Example:
Dim sInfo As Variant
sInfo = Array("1", "2", "three")
MsgBox sInfo(2)
The above code outputs "three" when Option Base 0 is in use. |
| as | Exact | |
| asc | Exact | |
| atomic_datatype | Atomic Datatypes:Boolean Byte Char Date -- See date_object Double Integer Long String | |
| binary | Refer to file_handling | |
| boolean | Refer to atomic_datatype | |
| byref | None | Jabaco ByVal and ByRef keywords have no effect. Apparently Jabaco considers all parameters as ByVal--modifications of parameters within the subroutine will never affect the values of the variables in the calling subroutine. Therefore, calling ByVal has no effect. Also, calling ByRef has no effect--it does not override the ByVal behavior. At this point, there is no way to have a ByRef parameter in a Jabaco subroutine call. A deeper concern the arises from this is: By default, VB considers subroutine and function parameters as ByRef. Jabaco's current "default" behavior is to consider all parameters ByVal. This could obviously change the runtime behavior or VB code imported into Jabaco. |
| byte | Refer to atomic_datatype | |
| byval | None | Refer to byref |
| case | Refer to select..case | |
| cbool | Differences | CBool when used in VB will raise a "Type Mismatch" error (Or a "Invalid Use Of Null") when the supplied value cannot be converted to boolean. Jabaco appears to convert values successfully (i.e. string "True" to boolean True), but does not raise errors for invalid values. |
| cdate | None | Conversions of strings to dates unreliable |
| char | Refer to atomic_datatype | |
| chdir | None | Not currently supported. See chdrive, curdir |
| chdrive | None | Not currently supported. See chdir, curdir |
| chr | Exact | |
| clng | Differences | CLng when used in VB will raise a "Type Mismatch" error (Or a "Invalid Use Of Null") when the supplied value cannot be converted to boolean. Jabaco appears to convert values successfully (i.e. string "123" to long 123), but does not raise errors for invalid values. |
| close | Refer to file_handling | |
| command | None | Not supported. VB: Command (Command$) function will return command line parameters. |
| const | Exact | |
| constants | The following Visual Basic constants have been implemented in Jabaco. This is not a complete list, but includes the constants I have verified...vbCr vbCrLf vbKeyAdd vbKeyDelete vbKeyDown vbKeyEnd vbKeyEscape vbKeyF1..12 vbKeyHome vbKeyLeft vbKeyNumpad0..9 vbKeyPageDown vbKeyPageUp vbKeyRight vbKeyUp vbKeyInsert vbNo vbYes vbYesNo vbDirectory: See getattr | |
| createobject | None | Does not apply. CreateObject in VB performs a late binding object instantiation of an ActiveX object. |
| cstr | Differences | CStr converts values to strings in most cases, with the following exceptions:MsgBox CStr(False)VB: This statement returns "False" J: This statement returns "0" MsgBox CStr(Null)VB: This statement raises "Invalid Use Of Null" error J: This statement returns an empty string "". |
| curdir | None | CurDir function not implemented in Jabaco. VB: CurDir returns the current working directory, which can be changed by ChDir, ChDrive |
| date | Refer to atomic_datatype | |
| date_object | Differences | There are currently many differences between VB and Jabaco concerning date handling. 1) In VB, there is an atomic data type "Date" which can be dimensioned as you would ay other type such as Integer, etc. A VB Date type holds a date/time value. In Jabaco, a "Date" is currently a reference to the Java "date" object type, which has a different functionality.
VB: Dim MyDate as Date
J: Dim MyDate as Date
Set MyDate = New Date
Although the above code would compile, the behavior or MyDate in Jabaco will not match the expected VB behavior. |
| datediff | None | DateDiff function is not implemented. |
| day | None | Date functions are not reliable. |
| dim | Exact | |
| dir | Differences | Dir does not appear to support wild cards. If a file "C:\test.txt" exists, and the following statement is executed:
sFile = Dir$("c:\*.txt")
Jabaco returns an empty string. VB would have applied the wildcard and found "test.txt"However, it does successfully test the existence of a file in the case of sFile = Dir$("c:\test.txt") |
| do | Refer to do..loop_until | |
| do..loop_until | Exact | Compatible, Exit Loop supported. |
| doevents | Exact | |
| double | Refer to atomic_datatype | |
| else | Exact | Applies to: if..then select..case |
| end | None | Standalone "End" statement to terminate program appears to be unsupported. Use the following work-around:VB: End J: system.exit(0) |
| enum | Exact | Enum appears to be supported. The IDE tips may not suggest the Enum members in all cases. |
| eof | Refer to file_handling | |
| erase | Refer to redim | |
| error | Refer to on..error | |
| exit | Exact | Applies to: do..loop_until for..next |
| file_handling | Differences | For basic file handling, the syntax and objects for opening, closing, reading, writing, and file modes is as follows:
VB: F=FreeFile
J: Dim F as VBFileHandler
VB: Open "file.txt" For Output As #F
J: F=Open("file.txt",Output,Write,Shared)
VB: Print #F,"hello"
J: F.WriteString "hello"
VB: Input #F,sValue
J: sValue=F.read
VB: Line Input #F,sLine
J: sLine=F.readLine
VB: Close #F
J: F.close
Jabaco also has additional file handling options, follow the tool tips of the VBFileHandler object. |
| filecopy | No documentation for this topic. | |
| filedatetime | No documentation for this topic. | |
| fileexists | No documentation for this topic. | |
| filelen | No documentation for this topic. | |
| for | Refer to for..next | |
| for..next | Exact | |
| format | Differences | Format in VB is a catch-all statement, researching Jabaco equivalents now: |
| freefile | Refer to file_handling | |
| function | Exact | |
| get | No documentation for this topic. | |
| getattr | Differences | Supported, but specifics unknown |
| goto | This entry refers to the Goto statement. For use with "error", see on..error. | |
| hex | No documentation for this topic. | |
| hour | No documentation for this topic. | |
| if | Refer to if..then | |
| if..then | Exact | |
| input_#f | Refer to file_handling | |
| inputbox | No documentation for this topic. | |
| instr | No documentation for this topic. | |
| instrrev | No documentation for this topic. | |
| integer | Refer to atomic_datatype | |
| is | No documentation for this topic. | |
| isdate | No documentation for this topic. | |
| isnull | No documentation for this topic. | |
| isnumeric | No documentation for this topic. | |
| join | No documentation for this topic. | |
| kill | No documentation for this topic. | |
| lcase | No documentation for this topic. | |
| left | No documentation for this topic. | |
| len | No documentation for this topic. | |
| let | No documentation for this topic. | |
| line | No documentation for this topic. | |
| load | No documentation for this topic. | |
| loadpicture | No documentation for this topic. | |
| lof | No documentation for this topic. | |
| long | Refer to atomic_datatype | |
| loop | Refer to do..loop_until | |
| me | No documentation for this topic. | |
| mid | No documentation for this topic. | |
| minute | No documentation for this topic. | |
| mkdir | No documentation for this topic. | |
| mod | No documentation for this topic. | |
| month | No documentation for this topic. | |
| msgbox | No documentation for this topic. | |
| new | No documentation for this topic. | |
| next | Refer to for..next | |
| not | Refer to operators | |
| nothing | No documentation for this topic. | |
| now | No documentation for this topic. | |
| on | Refer to on..error | |
| on..error | No documentation for this topic. | |
| open | Refer to file_handling | |
| operators | No documentation for this topic. | |
| optional | No documentation for this topic. | |
| or | Refer to operators | |
| paramarray | No documentation for this topic. | |
| popupmenu | No documentation for this topic. | |
| preserve | Refer to redim | |
| No documentation for this topic. | ||
| print_#f | Refer to file_handling | |
| private | No documentation for this topic. | |
| public | No documentation for this topic. | |
| put | No documentation for this topic. | |
| raiseevent | No documentation for this topic. | |
| redim | Exact | Dim, Redim, and Erase (for dynamic arrays) are supported. |
| replace | No documentation for this topic. | |
| resume | No documentation for this topic. | |
| right | No documentation for this topic. | |
| rmdir | No documentation for this topic. | |
| second | No documentation for this topic. | |
| select | Refer to select..case | |
| select..case | Differences | Select, Case, and Case Else all work as expected. However, defining ranges using the "To" keyword is not supported:Select Case sValue Case 1 'Supported Case 2,3,4 'Supported Case 5 to 10 'NOT SUPPORTED Case Else 'Supported End Select |
| set | No documentation for this topic. | |
| single | No documentation for this topic. | |
| space | No documentation for this topic. | |
| split | No documentation for this topic. | |
| static | No documentation for this topic. | |
| step | Refer to for..next | |
| stop | No documentation for this topic. | |
| string | Refer to atomic_datatype | |
| string_function | No documentation for this topic. | |
| sub | No documentation for this topic. | |
| then | Refer to if..then | |
| timer | No documentation for this topic. | |
| to | Applies to: for..next select..case dim redim | |
| trim | No documentation for this topic. | |
| type | No documentation for this topic. | |
| ubound | No documentation for this topic. | |
| ucase | No documentation for this topic. | |
| unload | No documentation for this topic. | |
| until | Refer to do..loop_until | |
| val | No documentation for this topic. | |
| variant | No documentation for this topic. | |
| vbkeypause | No documentation for this topic. | |
| vbkeysubtract | No documentation for this topic. | |
| vblf | No documentation for this topic. | |
| vbminimized | No documentation for this topic. | |
| vbokonly | No documentation for this topic. | |
| vbstring | No documentation for this topic. | |
| vbtab | No documentation for this topic. | |
| vbtextcompare | No documentation for this topic. | |
| vbunchecked | No documentation for this topic. | |
| weekday | No documentation for this topic. | |
| wend | Refer to while..wend | |
| while | Refer to while..wend | |
| while..wend | No documentation for this topic. | |
| with | No documentation for this topic. | |
| withevents | No documentation for this topic. |