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Listbox is empty in 64 bit C++

 
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Ryan



Joined: 25 Feb 2016
Posts: 73

PostPosted: Fri Jul 12, 2019 11:38 am    Post subject: Listbox is empty in 64 bit C++ Reply with quote

The following works under 32 bit but when compiled with /64 the listbox is empty. I have tried passing the number of items (as noted below) but this results in a winio error.


Code:


#include <stdlib.h>
#include <windows.h>

// Compile with;
//   scc ls.cpp /link
// or
//   scc ls.cpp /link /64
int main()
{
    char *lb_items[] = {
        "Line 1",
        "Line 2",
        "Line 3",
        "Line 4", NULL};
    int selection=2;
    int numItems=4;

    winio("%ca[Listbox test]&");
    // Works in 32 bit, 64 bit shows an empty list.
    winio("%40.4ls",lb_items,&selection);

    // Trying to pass number of items (as per docs) 'Error - Unused arguments in winio call.'
    //winio("%40.4ls",lb_items,&numItems,&selection);

    return 0;
}
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PaulLaidler
Site Admin


Joined: 21 Feb 2005
Posts: 5913
Location: Salford, UK

PostPosted: Fri Jul 12, 2019 12:38 pm    Post subject: Reply with quote

It works OK if you make the array static...

Code:
static char *lb_items[] = {


Given more time I may be able to explain why.
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Ryan



Joined: 25 Feb 2016
Posts: 73

PostPosted: Fri Jul 12, 2019 12:41 pm    Post subject: Reply with quote

Thank you Paul, that works for me too.

Time is a precious thing, I'm not worried about why it works (unless you are).
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