Constants
You can use following constants:
hmCal_DayView 1
hmCal_MultiDayView 2
hmCal_MonthView 3
hmCal_UserView 4
hmCal_UserMultiDayView 5
hmCal_ProjectView 6
hmCal_ResourcesView 7
hmCal_NoError 0
hmCal_HandleError -1
hmCal_AppointmentNotFound -2
hmCal_UserNotFound -3
hmCal_AppAlreadyExists -4
hmCal_StylesheetAlreadyExists -5
hmCal_StylesheetNotFound -6
hmCal_CreationNotPossible -7
hmCal_UserAlreadyExists -8
hmCal_SupAppNotFound -9
hmCal_RelationNotFound -10
hmCal_ViewNotSupported -11
hmCal_ActionNotPossible -12
hmCal_InvalidTransfermode -13
hmCal_InvalidPath -14
hmCal_CalendarNotFound -15
hmCal_WrongPictureFormat -16
hmCal_IconNotFound -17
hmCal_IconAlreadyExists -18
hmCal_ColumnAlreadyExists -19
hmCal_ColumnNotFound -20
hmCal_WrongRelationType -21
hmCal_WrongTimezone -22
hmCal_InvalidArraySize -23
hmCal_InvalidRange -24
hmCal_CellNotFound -25
hmCal_SpecialDayNotFound -26
hmCal_UpdateAppointments 1
hmCal_DragAppointment 2
hmCal_ResizeAppointment 3
hmCal_NewAppointment 4
hmCal_DeleteAppointment 5
hmCal_DoubleClickApp 6
hmCal_ClickAppointment 7
hmCal_DoubleClickArea 8
hmCal_ClickArea 9
hmCal_Drop 10
hmCal_TryNewAppointment 11
hmCal_TryDragAppointment 12
hmCal_TryResizeAppointment 13
hmCal_Error 14
hmCal_Update_RRULE 15
hmCal_DoubleClickRelation 16
hmCal_ClickRelation 17
hmCal_NewRelation 18
hmCal_DeleteRelation 19
hmCal_ClickAppCurrent 20
hmCal_DoubleClickAppCurrent 21
hmCal_ResizeObject 22
hmCal_SortAppointment 23
hmCal_prop_UserListWidth 1
hmCal_prop_MultiDayArea 2
hmCal_prop_SwitchUser 3
hmCal_prop_NewLineHeight 4
hmCal_prop_DefaultEffect 5
hmCal_prop_Overlapping 7
hmCal_prop_ScrollAutoHide 8
hmCal_prop_ColumnWidth 9
hmCal_prop_DisplayTime 10
hmCal_prop_AllowDragNew 11
hmCal_prop_DeleteKey 12
hmCal_prop_FreezeView_V 13
hmCal_prop_ShowMonthHeader 14
hmCal_prop_LeftBarWidth 15
hmCal_prop_FreezeView_H 16
hmCal_prop_IndicateOutsideApp 17
hmCal_prop_GridCaption 18
hmCal_prop_GridHourLine 19
hmCal_prop_GridHalfHourLine 20
hmCal_prop_Add3points 21
hmCal_prop_OneLineCaption 22
hmCal_prop_RepeatTimeline 23
hmCal_prop_ShowTimeline 24
hmCal_prop_ShowHeader 25
hmCal_prop_CurrentTimeIndicator 26
hmCal_prop_GMTexport 27
hmCal_prop_MultiDayAreaHeight 28
hmCal_prop_AutoMonthWeeks 29
hmCal_prop_MultiDayAreaResize 30
hmCal_prop_ColumnLines 31
hmCal_prop_DragTimeVisible 32
hmCal_prop_proj_scaleweek 33
hmCal_prop_proj_scalemonth 34
hmCal_prop_proj_scalequarter 35
hmCal_prop_proj_scaleyear 36
hmCal_prop_PrintingWidth 37
hmCal_prop_PrintingHeight 38
hmCal_prop_ProjectAreaHeight 39
hmCal_prop_DrawAsRect 40
hmCal_prop_ShowResources 41
hmCal_prop_SyncArea 42
hmCal_prop_UserListLock 43
hmCal_prop_AutoUpdateApp 44
hmCal_prop_ResourcesHourGrid 45
hmCal_prop_MaxLines 46
hmCal_prop_TimelineShift 47
hmCal_prop_Lineheight 48
hmCal_aprop_ID 1
hmCal_aprop_CalendarID 2
hmCal_aprop_Textheader 3
hmCal_aprop_Textbody 4
hmCal_aprop_Tiptext 5
hmCal_aprop_AllDay 6
hmCal_aprop_DateFrom 7
hmCal_aprop_DateTo 8
hmCal_aprop_TimeFrom 9
hmCal_aprop_TimeTo 10
hmCal_aprop_Effect 11
hmCal_aprop_DoneStatus 12
hmCal_aprop_Milestone 13
hmCal_aprop_Icon 14
hmCal_aprop_Lock 15
hmCal_aprop_SupAppointment 16
hmCal_aprop_HeaderVisible 17
hmCal_aprop_TimeVisible 18
hmCal_aprop_ShowCurrentTime 19
hmCal_aprop_CurrDateFrom 20
hmCal_aprop_CurrDateTo 21
hmCal_aprop_CurrTimeFrom 22
hmCal_aprop_CurrTimeTo 23
hmCal_aprop_Location 24
hmCal_aprop_Expand 25
hmCal_aprop_Priority 26
hmCal_aprop_UID 27
hmCal_aprop_URL 28
hmCal_aprop_Independent 29
hmCal_aprop_DrawAsRect 30
hmCal_aprop_HasSubApps 31
hmCal_aprop_Icon2 32
hmCal_aprop_Icon3 33
hmCal_cprop_width 1
hmCal_cprop_visible 2
hmCal_cprop_headertext1 3
hmCal_cprop_headertext2 4
hmCal_cprop_alignment 5
hmCal_cprop_resizeable 6
hmCal_cprop_minwidth 7
hmCal_cprop_headeralignment 8
hmCal_Effect_Normal 0
hmCal_Effect_Dim 1
hmCal_Effect_Fading 2
hmCal_Effect_LeftBar 3
hmCal_rrule_none 0
hmCal_rrule_secondly 1
hmCal_rrule_minutely 2
hmCal_rrule_hourly 3
hmCal_rrule_daily 4
hmCal_rrule_weekly 5
hmCal_rrule_monthly 6
hmCal_rrule_yearly 7
hmCal_rel_EndToBegin 1
hmCal_rel_BeginToBegin 2
hmCal_rel_EndToEnd 3
hmCal_rel_BeginToEnd 4
hmCal_clr_Background 1
hmCal_clr_Workinghours 2
hmCal_clr_Selection 3
hmCal_clr_AppNewBackground 4
hmCal_clr_AppNewForeground 5
hmCal_clr_AppNewHeadertext 6
hmCal_clr_AppNewDescrtext 7
hmCal_clr_ProjectAltBackground 8
hmCal_clr_Relation 9
hmCal_clr_Description 10
hmCal_clr_Hourline 11
hmCal_clr_Halfhourline 12
hmCal_clr_AppBackcolor 13
hmCal_clr_AppForecolor 14
hmCal_clr_AppHeadertext 15
hmCal_clr_AppDescrtext 16
hmCal_clr_UserBackground 17
hmCal_clr_ColumnBackground 18
hmCal_clr_ColumnText 19
hmCal_clr_ColumnHeadertext 20
hmCal_clr_CurrentTimeIndicator 21
hmCal_clr_CurrAppBackcolor 22
hmCal_clr_CurrAppForecolor 23
hmCal_clr_CurrAppHeadertext 24
hmCal_clr_CurrAppDescrtext 25
hmCal_clr_CellText 26
hmCal_clr_CellBackground 27
hmCal_picture_jpg 1
hmCal_picture_png 2
hmCal_picture_bmp 3
hmCal_picture_gif 4
hmCal_picture_tiff 5
hmCal_picture_pdf 6
hmCal_picture_svg 7