# a error

**URL:** <https://tech-community.robotics.abb.com/t/a-error/2050>\
**Category:** Developer Tools\
**Created:** [August 4, 2008, 9:37am UTC](https://tech-community.robotics.abb.com/t/a-error/2050 "2008-08-04T09:37:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![zijiang](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zijiang](https://tech-community.robotics.abb.com/u/zijiang)\
**Post date:** [August 4, 2008, 9:37am UTC](https://tech-community.robotics.abb.com/t/a-error/2050/1 "2008-08-04T09:37:01Z")

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Hi

I’m studying pc-sdk, According to Robot Application Builder Manual.pdf ,on page 207 When create a simeple pc sdk application ,but do add a network watcher step there are error : _Error 1 ‘HandleLostEvent’ is not a member of ‘WindowsApplication1.Form1’. C:DataVisual Studio 2005Projects estpcsdk1 estpcsdk1Form1.vb 39 54 testpcsdk1_

_how do i do?_

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<div class="post-metadata">

**Author:** ![zijiang](https://avatars.discourse-cdn.com/v4/letter/z/8edcca/32.png) [@zijiang](https://tech-community.robotics.abb.com/u/zijiang)\
**Post date:** [August 4, 2008, 10:03am UTC](https://tech-community.robotics.abb.com/t/a-error/2050/2 "2008-08-04T10:03:53Z")

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according to manual detect 2 error

Error 1 ‘HandleLostEvent’ is not a member of ‘WindowsApplication1.Form1’. C:DataVisual Studio 2005Projects estpcsdk1 estpcsdk1Form1.vb 39 54 testpcsdk1

Error 3 ‘Available’ is not a member of ‘System.Windows.Forms.ColumnHeader’. C:DataVisual Studio 2005Projects estpcsdk1 estpcsdk1Form1.vb 68 46 testpcsdk1

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<div class="post-metadata">

**Author:** ![RussD](https://avatars.discourse-cdn.com/v4/letter/r/dec6dc/32.png) [@RussD](https://tech-community.robotics.abb.com/u/RussD)\
**Post date:** [August 6, 2008, 4:55pm UTC](https://tech-community.robotics.abb.com/t/a-error/2050/3 "2008-08-06T16:55:02Z")

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You have to manually add references to your project to use PCSDK functionality, pretty much all of the .dlls in PC SDKin.