Month Calendar : output selected range to MessageBox - pls explain

Then what is the MonthCal_GetSelRange() for? Shouldn't there be a way to pass it's contents, of the 2 element array of SYSTEMTIME structures?? Or at least handle them for processing in some way?

Quote:

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Originally Posted by Morbane

Then what is the MonthCal_GetSelRange() for? Shouldn't there be a way to pass it's contents, of the 2 element array of SYSTEMTIME structures?? Or at least handle them for processing in some way?

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Didn't you read the MSDN about MonthCal_GetSelRange? :confused:

Quote:

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MonthCal_GetSelRange


Retrieves date information that represents the upper and lower limits of the date range currently selected by the user. You can use this macro or send the MCM_GETSELRANGE message explicitly.

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And it's up to you where and how to use the returned SYSTEMTIME array with these "upper and lower limits of the date range currently selected by the user".

Ok...
I have managed to isolate the lower and upper ranges of MonthCal_GetSelRange(), thus:

Code:

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SYSTEMTIME rng[2];

                    MonthCal_GetSelRange(hWndMonthCal, rng);
                    SYSTEMTIME low = rng[0];
                    SYSTEMTIME high = rng[1];

                    char buf1[30];
                    GetDateFormat(NULL, DATE_LONGDATE, &low, NULL, buf1, 30);
                    char buf2[30];
                    GetDateFormat(NULL, DATE_LONGDATE, &high, NULL, buf2, 30);

                    MessageBox(hwndDlg, buf, "Current Date", 0);

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How do I get buf1 and buf2 into the MessageBox as a single unit with a pretty "to" in between?

1. Why not just pass in the rng[0], rng[1]? Example:

Code:

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    char buf1[30];
    GetDateFormat(NULL, DATE_LONGDATE, &rng[0, NULL, buf1, 30);

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2.

Code:

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char buf[100];
strcpy(buf, buf1);
strcat(buf, " to ");
strcat(buf, buf2);
MessageBox(hwndDlg, buf, "Current Date", 0);

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Very NICE indeed.

I looked at strcat and the example in cplusplus.com/reference, but I hesitated, I wasn't sure about how it would work. It was exactly what I needed nevertheless.

Thanks again (and again :)

Just by the by, in my calendar, if someone were to only select 1 day - the output remains twofold, in such a case it says October 19, 2010 to October 19, 2010. Is there a way to prevent that duplication? I haven't explored that yet but I thought I would ask anyway.

So I tried this:

Code:

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                    if(buf1 == buf2)
                    {
                        MessageBox(hwndDlg, buf1, "Current Date", 0);
                    }
                    else
                    {
                        MessageBox(hwndDlg, buf, "Current Range", 0);
                    }

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But it doesn't work - the logic is messed up somehow.

Any suggestions?

Quote:

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Originally Posted by Morbane

So I tried this:

Code:

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                    if(buf1 == buf2)
 ...

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But it doesn't work - the logic is messed up somehow.

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Of course it doesn't!
Because you compare the values of two pointers which are absolutely different!
You have to compare SYSTEMTIME objects (rng[0] and rng[1] in your case)

When I try to use:

Code:

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if(rng[0] == rng[1])
...

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It says "there is no match for operator== for rng[0] == rng[1]"

I know about overloading operators - but I do not know how or if it necessary.

Or I am doing something wrong again.

Any suggestions?

Again, Thanks.

Ok, then compare each member of SYSTEMTIME that makes sense for you. Like:

Code:

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SYSTEMTIME rng[2];
...
if(        rng[0].wYear == rng[1].wYear &&
        rng[0].wMonth == rng[1].wMonth &&
        rng[0].wDay == rng[1].wDay )
{
        MessageBox(hwndDlg, buf1, "Current Date", 0);
}
...

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Victor, you are amazing.

I have experimented with the SYSTEMTIME members in various efforts to get this worked out, but at this point, it is quite late here and I don't think I would have thought of it on my own in this case.

Many thanks.

See you next time, no doubt I will be back for more insights.