How do I copy macro button from one workbook to another?

I need to copy Sheet1 in Mail.xlsm (attached) to another workbook OtherWorkbook.xlsm. My copy procedure is this - with both workbooks open, I go into Developer/Visual Basic and drag the module/macro from Mail.xlsm to OtherWorkbook.xlsm. I then copy Sheet1 from Mail.xlsm to OtherWorkbook.xlsm.

When I click the button/macro in Sheet1 of OtherWorkbook.xlsm the result is - Compile error: User-defined type not defined. Also, underlying code is displayed with Public Sub CreateAnEmail() highlighted in yellow and the lineDim objOutlook As Outlook.Application highlighted in blue.
Mail.xlsm
K_DeutschAsked:
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als315Commented:
References to additional libraries are not inserted automatically.
After copy you should open (in VBA editor) Tools-References from menu and add reference to proper Outlook library (in my case Microsoft Outlook 14.0):
library
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K_DeutschAuthor Commented:
Works. Thanks for the tip.
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