OFN_SHOWHELP top-level constant
int
const OFN_SHOWHELP
Causes the dialog box to display the Help button. The hwndOwner member must specify the window to receive the HELPMSGSTRING registered messages that the dialog box sends when the user clicks the Help button. An Explorer-style dialog box sends a CDN_HELP notification message to your hook procedure when the user clicks the Help button.
Implementation
const OFN_SHOWHELP = 0x00000010;