Linking problem: IsWindowVisible

Chris Faylor
Wed Mar 15 07:02:00 GMT 2000

On Wed, Mar 15, 2000 at 03:57:56PM +0100, Axel Riese wrote:
>> > Hm, in this case you should have problems at compile time, not at
>> > link time, shouldn't you ?
>> Not necessarily.  In the absence of a declaration, C will guess "int
>> IsWindowVisible()", which in this case is wrong.
>> BTW you can catch such problems by compiling with -Wall:
>Yes, clear. But I have my doubts that one can get an undefined reference
>due to a missing declaration. Anyway, adding -mwindows or -luser32
>should solve the problem.

Your doubts are wrong.  If you haven't declared the function correctly
this is exactly what you'll get.


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