The WebBrowser control doesn't expose any method to directly print its contents. You can achieve this effect through the ExecWB method, by passing the OLECMDID_PRINT constant in its first argument:
' display the Print dialog
WebBrowser1.ExecWB OLECMDID_PRINT, OLECMDEXECOPT_PROMPTUSER
You can also immediately print the current document in the WebBrowser without displaying any dialog, as follows:
WebBrowser1.ExecWB OLECMDID_PRINT, OLECMDEXECOPT_DONTPROMPTUSER
Note that the ExecWB method raises an error if the WebBrowser control doesn't contain any document, so in production code the above statements should be protected by an On Error command.
The ExecWB support several other constants that let you access additional WebBrowser's features. For example, you can display the PageSetup dialog with the following code
WebBrowser1.ExecWB OLECMDID_PAGESETUP, OLECMDEXECOPT_DODEFAULT