DateTime_SetRange

[Werner Bleckwendt]

Hi,

I am trying to set the valid range (a month) to a calendar control. It works fine with the low date or with the high date, but I am unable to set a range (only days from a defined month are allowed). Can somebody point me in the right direction please?

LOCAL dt AS SYSTEMTIME
control handle cbhndl, %IDC_BUDAT to hdp
	if isfalse DateTime_SetRange (hdp, %GDTR_MIN, dt) then
	   ? "Can't set min range"
	end if 
 dt.wDay=VAL(right$(LastDay(sDate),2))
	if isfalse DateTime_SetRange (hdp, %GDTR_MAX, dt) then
	  ? "Max-Bereich kann nicht gesetzt werden"
	end if

Thanks in advance for your help
rgds
Werner

[Michael Mattias]

Without testing, I can just cite the SDK...

GDTR_MIN
The first [italics mine] element in the SYSTEMTIME structure array is valid and will be used to set the minimum allowable system time.

GDTR_MAX
The second element in the SYSTEMTIME structure array is valid and will be used to set the maximum allowable system time.

i.e, I don't think MAX should be working the way you've coded it.

But it appears you can do both in one shot...

  LOCAL dt() AS SYSTEMTIME
 
 REDIM dt(1) 
 dt(0)   =   Minimum 
 dt(1)   =  Maximum 
 iret =  DateTime_setRange (hdp, %GDTR_MIN OR %GDTR_MAX, BYVAL VARPTR(dt(0))

MCM

[Werner Bleckwendt]

Thanks Michael,

that works like a charme.

rgds
Werner

[Michael Mattias]

Amazing.

You and Good Things Happen.

Anyone still wonder why I say "reading, understanding and applying the Microsoft Windows API documentation" is a skill all PB programmers should - no, must - consider fundamental?

[Cliff Nichols]

"reading, understanding and applying the Microsoft Windows API
documentation"

Reading

Can't even BEGIN to explain how many times I read, re-read, and re-read again the docs

Understanding

Sometimes I could get 3 or even more "Understanding"'s of what the docs say, and when I think I FINALLLLLLlllllllyyyyy get it

Applying

Try...if fail, try again and again until no fail....orrrrrrr if just can not find what I missed

ASK!!!!!!!!!!!


I don't know about the rest of you guys, but I sure get a lot more of knowledge from a simple working example, than I do from the docs. ESPECIALLY well commented code that does something similar (or even just part of) the idea I am trying to do.

But hey...thats what PB is for....to illuminate the ole dim bulb and make you go "DOH" so that you finally learn what you totally misunderstood before

(and yes....as many of you know....I probably have a daily (or close enough) case of CNDS)

[Michael Mattias]

Like any skill (I did refer to it as a "skill" didn't I? Whew! Yes, I did), Cliff, reading, understanding and applying improves with practice.