How do I specify POST parameters in wfetch

I am testing an API, how do I specify the parameters to be passed for a POST request in Micr开发者_JAVA百科osoft's wfetch.exe?

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You need to set "Advanced Request" dropdown to "Add Headers & Body"

then in the textbox put:

Content-Type: application/x-www-form-urlencoded\r\n
\r\n
Field1=value&Field2=value2\r\n

If you have a large amount of form data to post you can use the "from file" option