ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Core Namespace / StartProjectMode Enumeration
Example Example Version

StartProjectMode Enumeration
Specifies the start mode for the ArcGIS Pro application
Syntax
Members
MemberDescription
ShowStartPage Show the start page (this is the default)
WithDefaultProjectOpen the default project specified in GeneralOptions.StartupProjectPath
WithoutProjectTempate Bypass the start page and begin working without a template
Example
Set GeneralOptions to Use Defaults
//Default options can be set regardless of the value of the "companion"
//path (to a project, folder, gdb, toolbox, etc.). The path value is ignored if
//the option setting does not use it. This is the same behavior as on the Pro UI.
ApplicationOptions.GeneralOptions.StartupOption = StartProjectMode.ShowStartPage;
ApplicationOptions.GeneralOptions.HomeFolderOption = OptionSetting.UseDefault;
ApplicationOptions.GeneralOptions.DefaultGeodatabaseOption = OptionSetting.UseDefault;
ApplicationOptions.GeneralOptions.DefaultToolboxOption = OptionSetting.UseDefault;//set default option first

//path values can (optionally) be set (back) to null if their 
//"companion" option setting is the default option.
if (ApplicationOptions.GeneralOptions.StartupOption != StartProjectMode.WithDefaultProject)
  ApplicationOptions.GeneralOptions.StartupProjectPath = null;
if (ApplicationOptions.GeneralOptions.HomeFolderOption == OptionSetting.UseDefault)
  ApplicationOptions.GeneralOptions.CustomHomeFolder = null;
if (ApplicationOptions.GeneralOptions.DefaultGeodatabaseOption == OptionSetting.UseDefault)
  ApplicationOptions.GeneralOptions.CustomDefaultGeodatabase = null;
if (ApplicationOptions.GeneralOptions.DefaultToolboxOption == OptionSetting.UseDefault)
  ApplicationOptions.GeneralOptions.CustomDefaultToolbox = null;
Inheritance Hierarchy

System.Object
   System.ValueType
      System.Enum
         ArcGIS.Desktop.Core.StartProjectMode

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also