Your pseudocode it a tad too simple. Once you determine the current foreground application, you'll need to find out which of it's windows or controls has the focus and obtain a handle to it. Then you'll need to determine if the control is of a type that will accept keystrokes.

Detecting that it's an editable text control isn't enough as it may be set readonly. Or it could be programmed to accept only numbers. Or a limited number of keystrokes, and the user may have already type something. If the user has highlighted the existing contents, your insertion will overwrite that. Same is true if the keyboard is in overwrite state.

Finally, how will your application decide when to send the keystrokes?

As by implication, it will not be in the foreground, it will not be in a position to accept user initiation of the insertion; and if you do it at some predetermined time or after some number of elapsed seconds, how will you know that the right application is in the foreground?

What you are asking to do is possible with Win32::GuiTest, but it is definitely not trivial. Depending upon what you are actually trying to achieve, it may well be easier to use an existing solution.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: (Windows) insert text at cursor in non-owned window by BrowserUk
in thread (Windows) insert text at cursor in non-owned window by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.