I am attempting to use SendKeys in Windows Powershell using a ComObject:

> $wshell = New-Object -ComObject wscript.shell
> $wshell.SendKeys('Hello World')

I would expect this to 'print' "Hello World" into the input of my powershell terminal.

> Hello World

Instead, I get '=' around the string.

> =Hello World=

This behaviour is per-call of SendKeys(). Given a test script of 'Test.ps1':

#Test.ps1
$wshell = New-Object -ComObject wscript.shell
$wshell.SendKeys('a')
$wshell.SendKeys('')
$wshell.SendKeys('test')

I run it, and get:

> .\Test.ps1
> =a====test=

I am on Windows 10, version 10.0.19042. My Powershell version is as follows:

> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      5.1.19041.1320
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.19041.1320
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1