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Determine When a Control Gets Focus

 Keywords: Dialog Determine Control Set Get Focus

Question:

Is there a way to remove the input in a EDITBOX when I click into the EDITBOX control?

Answer:

Here is some sample code that clears the editbox each time it gets focus. 
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#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)

   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)

   ;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

   ;DialogControlSet / DialogControlGet Constants
   DC_CHECKBOX=1             ; CHECKBOX
   DC_RADIOBUTTON=2          ; RADIOBUTTON
   DC_EDITBOX=3              ; EDITBOX MULTILINEBOX
   DC_TITLE=4                ; PICTURE RADIOBUTTON CHECKBOX PICTUREBUTTON VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON
   DC_ITEMBOXCONTENTS=5      ; ITEMBOX FILELISTBOX DROPLISTBOX
   DC_ITEMBOXSELECT=6        ; ITEMBOX FILELISTBOX DROPLISTBOX
   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
   DC_PICTUREBITMAP=12       ; PICTURE PICTUREBUTTON
   DC_TEXTCOLOR=13           ; RADIOBUTTON CHECKBOX VARYTEXT STATICTEXT GROUPBOX PUSHBUTTON ITEMBOX FIELLISTBOX DROPLISTBOX SPINNER EDITBOX MULTILINEBOX
   DC_ITEMBOXADD=14          ; ITEMBOX FILELISTBOX DROPLISTBOX
   DC_ITEMBOXREMOVE=15       ; ITEMBOX FILELISTBOX DROPLISTBOX
   DC_RADIOVALUE=16          ; RADIOBUTTON


   ;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
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#DefineSubRoutine MyDialogCallbackProc(MyDialog_Handle,MyDialog_Message,MyDialog_Name,MyDialog_EventInfo,rsvd)
InitDialogConstants()                                       ; Initialize Dialog Constants
   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,1)
         prevfocus = 0
        Return(RET_DO_DEFAULT)

     Case MSG_TIMER
         focusctrl = DialogControlState(MyDialog_Handle,0,DCSTATE_GETFOCUS,0) ; gets the current control number that has focus - a zero means no control has focus
         If focusctrl == prevfocus Then Break
         ;Check if EditBox
         If focusctrl == "EditBox_1"
            DialogControlSet(MyDialog_Handle,"EditBox_1",DC_EDITBOX,"")
         EndIf
         prevfocus = focusctrl
         Return(RET_DO_NOT_EXIT)

;     case MSG_BUTTONPUSHED
;        switch ON_EQUAL
;           case MyDialog_Name == "PushButton_OK"           ; ID "PushButton_OK"  PushButton_OK
;              return(RET_DO_DEFAULT)

;           case MyDialog_Name == "PushButton_Cancel"       ; ID "PushButton_Cancel"  PushButton_Cancel
;              return(RET_DO_DEFAULT)

;        endswitch                                          ; MyDialog_Name
;        return(RET_DO_DEFAULT)

;     case MSG_EDITBOX                                      ; ID "EditBox_1"  EditBox_1 ebVariable1
;        return(RET_DO_DEFAULT)

;     case MSG_COMBOCHANGE                                  ; ID "DropListBox_1"  DropListBox_1 dlVariable1
;        return(RET_DO_DEFAULT)

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



ebVariable1 = "Stuff"

MyDialogFormat=`WWWDLGED,6.2`

MyDialogCaption=`WIL Dialog 1`
MyDialogX=191
MyDialogY=042
MyDialogWidth=302
MyDialogHeight=151
MyDialogNumControls=005
MyDialogProcedure=`MyDialogCallbackProc`
MyDialogFont=`DEFAULT`
MyDialogTextColor=`DEFAULT`
MyDialogBackground=`DEFAULT,DEFAULT`
MyDialogConfig=0

MyDialog001=`077,131,036,012,PUSHBUTTON,"PushButton_OK",DEFAULT,"OK",1,10,32,DEFAULT,DEFAULT,DEFAULT`
MyDialog002=`189,131,036,012,PUSHBUTTON,"PushButton_Cancel",DEFAULT,"Cancel",0,20,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
MyDialog003=`085,017,124,024,DROPLISTBOX,"DropListBox_1",dlVariable1,DEFAULT,DEFAULT,30,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
MyDialog004=`105,053,054,012,EDITBOX,"EditBox_1",ebVariable1,"Edit 1",DEFAULT,40,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
MyDialog005=`081,055,022,012,STATICTEXT,"StaticText_1",DEFAULT,"Editbox:",DEFAULT,50,DEFAULT,DEFAULT,DEFAULT,DEFAULT`

ButtonPushed=Dialog("MyDialog")

User Reply:

Thank you for your help. The example is the answer to my question. 
Article ID:   W17741

Filename:   Determine When a Control Gets Focus.txt
File Created: 2009:08:14:09:30:48
Last Updated: 2009:08:14:09:30:48