Index of Droplistbox Selection

 Keywords: index number selected item droplistbox SendMessageA 387 CB_GETCURSEL CB_SETCURSEL

Question:

Is there any way of geting the index number of the selected item in a droplistbox? It is definitely possible for a dynamic list to have duplicate strings in the list... so getting the selected INDEX would be very very valuable. I've tried:
SendMessageA(DialogControlGet(dialog0,'cAppEdit_config_cbx',19),387,0,0)
387 is the constant for CB_GETCURSEL. I always get zero as a return :/

Answer:

Make sure you are calling "CB_SETCURSEL" (334) in the dialog's init event (0). This should then allow you to call CB_GETCURSEL can get a valid index value.

UDF example

Here is a complete code sample:

;-----------------------------------------------------------------------------------------------------------------------------------------;
;CBGet : Get info about ComboBox items                                                                             v1.0  ....IFICantBYTE  ;
;-----------------------------------------------------------------------------------------------------------------------------------------;
;hComboCtrl  : Handle to the Combo (DropList) Control                                                                                     ;
;GetWhat     : Use 1 to get the total number of items, anything else to get the index number of the selected item (in a zero based list)  ;
;-----------------------------------------------------------------------------------------------------------------------------------------;
;Returns     : Returns the total number of items, or the selected item's index number, depending on the request in the GetWhat parameter  ;
;-----------------------------------------------------------------------------------------------------------------------------------------;
#DefineFunction CBGet(hComboCtrl,GetWhat)
User32=StrCat(DirWindows(1),"user32.dll")
CB_GETCOUNT = 326;Gets the number of items in the list box of a combo box.
CB_GETCURSEL = 327;Gets the index of the currently selected item, if any, in the list box of a combo box.
If GetWhat == 1
        CB_Msg = CB_GETCOUNT
Else
        CB_Msg = CB_GETCURSEL
EndIf
Return DllCall(user32,long:"SendMessageA",long:hComboCtrl,long:CB_Msg,long:0,long:0)
#EndFunction
;##########################################################################################################################################


;TEST DIALOG BELOW:

;============================================================
;============================================================
;============================================================


#DefineSubRoutine InitDialogConstants()
   ;DialogprocOptions Constants
   MSG_INIT=0                    ; The one-time initialization
   MSG_TIMER=1                   ; Timer event
   MSG_BUTTONPUSHED=2            ; Pushbutton or Picturebutton
   MSG_RADIOPUSHED=3             ; Radiobutton clicked
   MSG_CHECKBOX=4                ; Checkbox clicked
   MSG_EDITBOX=5                 ; Editbox or Multilinebox
   MSG_FILESELECT=6              ; Filelistbox
   MSG_ITEMSELECT=7              ; Itembox
   MSG_COMBOCHANGE=8             ; Combobox/Droplistbox
   MSG_CALENDAR=9                ; Calendar date change
   MSG_SPINNER=10                ; Spinner number change
   MSG_CLOSEVIA49=11             ; Close clicked (Enabled via DialogProcOptions 1002
   MSG_FILEBOXDOUBLECLICK=12     ; Get double-click message on a FileListBox
   MSG_ITEMBOXDOUBLECLICK=13     ; Get double-click message on an ItemBox
   MSG_COMEVENT=14               ; COMCONTROL Event notification from DialogObject (NOT DialogProcOptions)
   MSG_MENUITEM=15               ; MenuItem selected
   MSG_MENUITEMINIT=16           ; MenuItem initialized
   MSG_RESIZE=17                 ; Dialog resized
   MSG_RVITEMSELROW=18           ; Reportview item select row
   MSG_RVDBLCLICKROW=19          ; Reportview double-click row
   MSG_RVCHECKEDITEM=20          ; Reportview checked/unchecked Item
   MSG_RVITEMTEXT=21             ; Reportview changed text of first column
   MSG_RVHEADER=22               ; Reportview header clicked

   DPO_DISABLESTATE=1000         ; codes -1=GetSetting 0=EnableDialog 1=DisableDialog
   DPO_CHANGEBACKGROUND=1001     ; -1=Get Current otherise bitmap or color string
   DPO_CHANGESYSMENU=1002        ; -1=Get Current 0=none 1=close 2=close/min 3=close/max 4=close/min/max
   DPO_CHANGETITLE=1003          ; Set/Get Dialog Title - (-1 to get)
   DPO_GETNAME=1004              ; Returns the name associated with a control's number.
   DPO_GETNUMBER=1005            ; Returns the number associated with a control's name.
   DPO_GETCLIENTAREA=1007        ; Returns a space delimited list of the width and height of the client area.

   ;DialogControlState Constants
   DCSTATE_SETFOCUS=1            ; Give Control Focus
   DCSTATE_QUERYSTYLE=2          ; Query control's style
   DCSTATE_ADDSTYLE=3            ; Add control style
   DCSTATE_REMOVESTYLE=4         ; Remove control style
   DCSTATE_GETFOCUS=5            ; Get control that has focus
   DCSTATE_MOVEMOUSEOVER=6       ; Move the mouse over the control

   DCSTYLE_DEFAULT=0             ; Set Default Style
   DCSTYLE_INVISIBLE=1           ; Set Control Invisible
   DCSTYLE_DISABLED=2            ; Set Control Disabled
   DCSTYLE_NOUSERDATA=4          ; Note: Setable via DialogControlState function ONLY SPINNER control only
   DCSTYLE_READONLY=8            ; Sets control to read-only (user cannot type in data) EDITBOX MULTILINEBOX SPINNER
   DCSTYLE_PASSWORD=16           ; Sets 'password mode' where only *'s are displayed EDITBOX
   DCSTYLE_DEFAULTBUTTON=32      ; Sets a button as the default button PUSHBUTTON PICTUREBUTTON
   DCSTYLE_DIGITSONLY=64         ; Set edit box to accept digits only EDITMOX MULTILINEBOX
   DCSTYLE_FLAT=128              ; Makes a 'flat' hyperlink-looking button PUSHBUTTON PICTUREBUTTON
   DCSTYLE_NOADJUST=256          ; Turns off auto-height adjustment  ITEMBOX FILELISTBOX
   DCSTYLE_TEXTCENTER=512        ; Center text in control VARYTEXT STATICTEXT
   DCSTYLE_TEXTRIGHT=1024        ; Flush-Right text in control VARYTEXT STATICTEXT
   DCSTYLE_NOSELCURLEFT=2048     ; No selection, cursor left EDITBOX MULTILINEBOX
   DCSTYLE_NOSELCURRIGHT=4096    ; No selection, cursor right EDITBOX MULTILINEBOX
   DCSTYLE_SHIELD=8192           ; Display Security Shield icon on button (Vista only) PUSHBUTTON PICTUREBUTTON
   DCSTYLE_MENUCHECK=32768       ; Adds a check mark to the left of a menu item MENUITEM
   DCSTYLE_MENURADIO=65536       ; Adds a radio button like dot graphic to the left of a menu item MENUITEM
   DCSTYLE_MENUSEP=131072        ; Separator bar graphic MENUITEM
   DCSTYLE_MENUBREAK=262144      ; Column break MENUBAR
   DCSTYLE_NOHEADER=524288       ; No header bar REPORTVIEW
   DCSTYLE_COLHEADER=1048576     ; First row column header REPORTVIEW
   DCSTYLE_GRIDLINES=2097152     ; Grid lines REPORTVIEW
   DCSTYLE_SELONEROW=4194304     ; Only one row can be selected at a time REPORTVIEW
   DCSTYLE_SELALLROW = 8388608   ; Highlight complete row REPORTVIEW
   DCSTYLE_SORTASC=16777216      ; Ascending sort REPORTVIEW
   DCSTYLE_SORTDESC=33554432     ; Descending sort REPORTVIEW
   DCSTYLE_EDITCOL=67108864      ; Edit first columns text REPORTVIEW
   DCSTYLE_COLCHECKBOX=134217728 ; Add checkbox to first column REPORTVIEW

   ;DialogControlSet / DialogControlGet Constants
   DC_CHECKBOX=1             ; CHECKBOX REPORTVIEW
   DC_RADIOBUTTON=2          ; RADIOBUTTON
   DC_EDITBOX=3              ; EDITBOX MULTILINEBOX
   DC_TITLE=4                ; PICTURE RADIOBUTTON CHECKBOX PICTUREBUTTON VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON MENUITEM
   DC_ITEMBOXCONTENTS=5      ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_ITEMBOXSELECT=6        ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_CALENDAR=7             ; CALENDAR
   DC_SPINNER=8              ; SPINNER
   DC_MULTITABSTOPS=9        ; MULTILINEBOX
   DC_ITEMSCROLLPOS=10       ; ITEMBOX FILELISTBOX
   DC_BACKGROUNDCOLOR=11     ; RADIOBUTTON CHECKBOX VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON ITEMBOX FILELISTBOX DROPLISTBOX SPINNER EDITBOX MULTILINEBOX REPORTVIEW
   DC_PICTUREBITMAP=12       ; PICTURE PICTUREBUTTON
   DC_TEXTCOLOR=13           ; RADIOBUTTON CHECKBOX VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON ITEMBOX FILELISTBOX DROPLISTBOX SPINNER EDITBOX MULTILINEBOX REPORTVIEW
   DC_ITEMBOXADD=14          ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_ITEMBOXREMOVE=15       ; ITEMBOX FILELISTBOX DROPLISTBOX REPORTVIEW
   DC_RADIOVALUE=16          ; RADIOBUTTON
   DC_POSITION=17            ; ALL CONTROLS (Except MENUBAR and MENUITEM)
   DC_MENUNAMES=18           ; ALL CONTROLS
   DC_HANDLE=19              ; ALL CONTROLS (Except MENUBAR and MENUITEM)
   DC_RVCOLHEAD=20           ; REPORTVIEW
   DC_RVCOLWIDTH=21          ; REPORTVIEW
   DC_RVADDCOL=22            ; REPORTVIEW
   DC_RVREMOVECOL=23         ; REPORTVIEW
   DC_RVMATCHCOL=24          ; REPORTVIEW
   DC_RVCANCELEDIT=25        ; REPORTVIEW
   DC_RVCHECKEDROWS=26       ; REPORTVIEW
   DC_RVJUSTIFY=27           ; REPORTVIEW


   ;DialogObject constants
   DLGOBJECT_ADDEVENT=1      ; Call dialog callback when the specified event occurs
   DLGOBJECT_STOPEVENT=2     ; Stop calling dialog callback when an event previously requested with
   DLGOBJECT_GETOBJECT=3     ; Return an object references to the specified control
   DLGOBJECT_GETPICTURE=4    ; Create and return an object reference to a picture object

   ;Return code constants
   RET_DO_CANCEL=0           ; Cancels dialog
   RET_DO_DEFAULT= -1        ; Continue with default processing for control
   RET_DO_NOT_EXIT= -2       ; Do not exit the dialog
   Return
#EndSubRoutine
;============================================================
;============================================================
;============================================================


InitDialogConstants()                                       ; Initialize Dialog Constants (need only be done once usually)

#DefineSubRoutine MyDialogCallbackProc(MyDialog_Handle,MyDialog_Message,MyDialog_Name,MyDialog_EventInfo,MyDialog_ChangeInfo)
   ON_EQUAL = @TRUE                                         ; Initialize variable ON_EQUAL
   Switch MyDialog_Message                                  ; Switch based on Dialog Message type
      Case MSG_INIT                                         ; Standard Initialization message
;         DialogProcOptions(MyDialog_Handle,MSG_TIMER,1000)
;         DialogProcOptions(MyDialog_Handle,MSG_BUTTONPUSHED,@TRUE)
         DialogProcOptions(MyDialog_Handle,MSG_COMBOCHANGE,@TRUE)
         hCombo = DialogControlGet(MyDialog_Handle,"DropListBox_1",19); get the windows handle of the DropList (Combo) control in the dialog


         Return(RET_DO_DEFAULT)

;     case MSG_BUTTONPUSHED
;        if MyDialog_Name == "PushButton_OK"                ; OK
;              return(RET_DO_DEFAULT)

;        elseif MyDialog_Name == "PushButton_Cancel"        ; Cancel
;              return(RET_DO_DEFAULT)

;        endif                                              ; MyDialog_Name
;        return(RET_DO_DEFAULT)

     Case MSG_COMBOCHANGE                                  ; ID "DropListBox_1"  dlVariable1
          TotalItems = CBGet(hCombo,1);Call the UDF to get the total number of items in the Combo (DropList) Box control
          SelectedItemIndex = CBGet(hCombo,0);Call the UDF to get the index of the selected item in the Combo control's list
          SelectedItemText = DialogControlGet(MyDialog_Handle,"DropListBox_1",6)
          Message("Returned result:","There are ":TotalItems:" items in the list.":@CR:"Item 0 (zero) is at the top, and you just selected the item with index number ":SelectedItemIndex:@CR:"which displays the text: ":SelectedItemText)

   EndSwitch                                                ; MyDialog_Message
   Return(RET_DO_DEFAULT)
#EndSubRoutine                                              ; End of Dialog Callback MyDialogCallbackProc

;============================================================
;============================================================
;============================================================

dlVariable1 = 'apple':@TAB:'banana':@TAB:'orange'
MyDialogFormat=`WWWDLGED,6.2`

MyDialogCaption=`Use the droplist (Combo) box to select an item`
MyDialogX=100
MyDialogY=100
MyDialogWidth=180
MyDialogHeight=167
MyDialogNumControls=003
MyDialogProcedure=`MyDialogCallbackProc`
MyDialogFont=`DEFAULT`
MyDialogTextColor=`DEFAULT`
MyDialogBackground=`DEFAULT,DEFAULT`
MyDialogConfig=0

MyDialog001=`013,145,036,012,PUSHBUTTON,"PushButton_OK",DEFAULT,"OK",1,10,32,DEFAULT,DEFAULT,DEFAULT`
MyDialog002=`131,145,036,012,PUSHBUTTON,"PushButton_Cancel",DEFAULT,"Cancel",0,20,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
MyDialog003=`013,019,148,118,DROPLISTBOX,"DropListBox_1",dlVariable1,DEFAULT,DEFAULT,30,DEFAULT,DEFAULT,DEFAULT,DEFAULT`

ButtonPushed=Dialog("MyDialog")

Article ID:   W17710

Filename:    Index of Droplistbox Selection .txt

File Created: 2014:04:14:08:56:38

Last Updated: 2014:04:14:08:56:38

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