The FINDMSGSTRING message is sent to the application by the Find dialog box or Replace dialog box whenever the user has typed selections and chosen the OK button. This message contains data specified by the user in the dialog box controls, such as the direction in which the application should search for a string, whether the application should match the case of the specified string, or whether the application should match the string as an entire word.
wParam
Not used.
lParam
Points to a FINDREPLACE structure containing information about the user's selections.
The application should return zero.
To use the FINDMSGSTRING message, the application must create a message identifier by using the RegisterWindowMessage and passing the FINDMSGSTRING constant as the function's only parameter.