Here is a UDF I made a long time ago to address the lack of colour selection in Dialog Calendar Controls, it is followed by an Example Dialog I just made..
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;CalSetColor : Sets the colours of a Calendar control. ....IFICantBYTE ;
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;hCalCtrl : Calendar Control handle ;
;Component : A number representing the part of the Calendar Control you want to change.... ;
; This can be one of the following MCSC_XXX Win32 API values: ;
; BACKGROUND = 0 , TEXT = 1 , TITLE BACKGROUND = 2 , TITLE TEXT = 3 , MONTH BACKGROUND = 4 , TRAILING TEXT = 5 ;
;RGB : Can be either: "RED|GREEN|BLUE" value (use 0 to 255 for each seperated by | as a text string - ie: in quotes) ;
; OR the decimal value of the RedGreenBlue combined values (as returned by this UDF or in memory locations) ;
;-----------------------------------------------------------------------------------------------------------------------------------------;
;Returns : The previous RGB value (as a decimal) OR -1 for failure ;
;-----------------------------------------------------------------------------------------------------------------------------------------;
#DefineFunction CalSetColor(hCalCtrl,Component,RGB)
User32=StrCat(DirWindows(1),"User32.dll")
MCM_SETCOLOR = 4106 ;MCM_FIRST = 4096 + 10
If IsInt(RGB) == @FALSE
R = ItemExtract(1,rgb,"|")
G = ItemExtract(2,rgb,"|")
B = ItemExtract(3,rgb,"|")
RGB = B*256*256 + G*256 + R
EndIf
Return DllCall(User32,long:"SendMessageA",long:hCalCtrl,long:MCM_SETCOLOR,long:Component,long:RGB)
#EndFunction
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;Example Dialog using above UDF:
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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)
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
DCSTYLE_INSHEADER=268435456 ; Include column header text 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
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InitDialogConstants() ; Initialize Dialog Constants (need only be done once usually)
#DefineSubroutine CalExampleCallbackProc(CalExample_Handle,CalExample_Message,CalExample_Name,CalExample_EventInfo,CalExample_ChangeInfo)
ON_EQUAL = @TRUE ; Initialize variable ON_EQUAL
switch CalExample_Message ; Switch based on Dialog Message type
case MSG_INIT ; Standard Initialization message
DialogProcOptions(CalExample_Handle,MSG_TIMER,500)
DialogProcOptions(CalExample_Handle,MSG_BUTTONPUSHED,@TRUE)
; DialogProcOptions(CalExample_Handle,MSG_CALENDAR,@TRUE)
hCal2 = DialogControlGet(CalExample_Handle,"Calendar_2",19);Get handle of Calendar control
CalTitleColour = "255|100|100" ; initial different colour variable
return(RET_DO_DEFAULT)
case MSG_TIMER;We set a half second timer above
CalTitleColour = CalSetColor(hCal2,2,CalTitleColour);Alternates between the previous and the current colours
return(RET_DO_NOT_EXIT)
case MSG_BUTTONPUSHED
If CalExample_Name <> "PushButton_Cancel" Then RGBlist = AskColor("","Select one",1);Select a colour if any button other than Cancel was pushed
if CalExample_Name == "PushButton_Cancel" ; Cancel
return(RET_DO_DEFAULT)
elseif CalExample_Name == "PushButton_BG" ; Background
CalSetColor(hCal2,0,RGBlist)
return(RET_DO_NOT_EXIT)
elseif CalExample_Name == "PushButton_Text" ; Text
CalSetColor(hCal2,1,RGBlist)
return(RET_DO_NOT_EXIT)
elseif CalExample_Name == "PushButton_TBG" ; Title Background
CalSetColor(hCal2,2,RGBlist)
return(RET_DO_NOT_EXIT)
elseif CalExample_Name == "PushButton_TText" ; Title Text
CalSetColor(hCal2,3,RGBlist)
return(RET_DO_NOT_EXIT)
elseif CalExample_Name == "PushButton_MBG" ; Month Background
CalSetColor(hCal2,4,RGBlist)
return(RET_DO_NOT_EXIT)
elseif CalExample_Name == "PushButton_TrailText" ; Trailing Text
CalSetColor(hCal2,5,RGBlist)
return(RET_DO_NOT_EXIT)
endif ; CalExample_Name
return(RET_DO_DEFAULT)
; case MSG_CALENDAR
; if CalExample_Name == "Calendar_1" ; caVariable1
; return(RET_DO_DEFAULT)
; elseif CalExample_Name == "Calendar_2" ; caVariable2
; return(RET_DO_DEFAULT)
; endif ; CalExample_Name
; return(RET_DO_DEFAULT)
endswitch ; CalExample_Message
return(RET_DO_DEFAULT)
#EndSubroutine ; End of Dialog Callback CalExampleCallbackProc
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CalExampleFormat=`WWWDLGED,6.2`
CalExampleCaption=`DllCall modification of Calendar control`
CalExampleX=002
CalExampleY=035
CalExampleWidth=296
CalExampleHeight=149
CalExampleNumControls=012
CalExampleProcedure=`CalExampleCallbackProc`
CalExampleFont=`DEFAULT`
CalExampleTextColor=`DEFAULT`
CalExampleBackground=`DEFAULT,DEFAULT`
CalExampleConfig=0
CalExample001=`229,025,056,012,PUSHBUTTON,"PushButton_BG",DEFAULT,"Background",1,10,32,DEFAULT,DEFAULT,DEFAULT`
CalExample002=`249,127,036,012,PUSHBUTTON,"PushButton_Cancel",DEFAULT,"Cancel",0,20,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample003=`007,003,100,016,STATICTEXT,"StaticText_1",DEFAULT,"Why are there no options to change colours in a standard Calendar control?",DEFAULT,30,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample004=`115,005,176,012,STATICTEXT,"StaticText_2",DEFAULT,"With a Dll Call we can do it.. click a button to select and change colours:",DEFAULT,40,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample005=`007,027,096,084,CALENDAR,"Calendar_1",caVariable1,DEFAULT,DEFAULT,50,DEFAULT,DEFAULT`
CalExample006=`117,027,096,084,CALENDAR,"Calendar_2",caVariable2,DEFAULT,DEFAULT,60,DEFAULT,DEFAULT`
CalExample007=`017,129,190,012,STATICTEXT,"StaticText_3",DEFAULT,"Example of how the colour of a calendar control can be modified by a DllCall()",DEFAULT,70,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample008=`229,041,056,012,PUSHBUTTON,"PushButton_Text",DEFAULT,"Text",2,80,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample009=`229,057,056,012,PUSHBUTTON,"PushButton_TBG",DEFAULT,"Title Background",3,90,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample010=`229,073,056,012,PUSHBUTTON,"PushButton_TText",DEFAULT,"Title Text",4,100,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample011=`229,089,056,012,PUSHBUTTON,"PushButton_MBG",DEFAULT,"Month Background",5,110,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
CalExample012=`229,105,056,012,PUSHBUTTON,"PushButton_TrailText",DEFAULT,"Trailing Text",6,120,DEFAULT,DEFAULT,DEFAULT,DEFAULT`
ButtonPushed=Dialog("CalExample")
Exit