Problem with CDTPicker

[Bruce Peaslee]

This crashes:

Code Select Expand


string s = "h:mm tt";
SendMessage(p_DTPicker->m_hwnd, DTM_SETFORMAT, 0, s);


That is the code used by the compiler.

Someone on the net said we need a pointer to a string so I tried this and it works:

Code Select Expand


string s = "h:mm tt";
SendMessage(p_DTPicker->m_hwnd, DTM_SETFORMAT, 0, &s);


[Rock Ridge Farm (Larry)]

I think it is because SendMessage expects a pointer as the last arg.

[Bruce Peaslee]

I think it is because SendMessage expects a pointer as the last arg.

I think that's right.

But, looking at the source code (always the bargain), CDTPicker::SetFormat sends the string.

[Bruce Peaslee]

Another peculiarity with the date-time picker has to do with setting just the time. I have the style of the control set to just display the time of day. When you send the message to set the time, the SYSTEMTIME structure has to be initialized with a date, even if we don't care about a date, or the API call fails.

Code Select Expand


SYSTEMTIME tm;
...
m_dlgItem.AddControl(CTDTPicker,"",142, 74, 90,20,ADTS_TIMEFORMAT, 0x200,ID_DTP_TIME);
...
tm.wHour   = StrToNum(StrLeft(sTime,StrFind(sTime,":")-1));
tm.wMinute = StrToNum(StrMid(sTime,StrFind(sTime,":")+1,2));
if((StrRight(sTime,2) == "PM") AND (tm.wHour < 12))
   tm.wHour += 12;
// need *some* value for date to get control to accept time
tm.wMonth = 1;
tm.wDay   = 1;
tm.wYear  = 2007;
SendMessage(p_dtpTime->m_hwnd, DTM_SETSYSTEMTIME , 0, &tm);


If it fails, the control sets to the local time.

[ludovico]

I try to addcontrol this but nothing appears, I also tried to create it with cdtpicker.create but it doesn't work

[sapero]

Bruce, you need to specify GDT_VALID in wParam:

Code Select Expand

SendMessage(p_dtpTime->m_hwnd, DTM_SETSYSTEMTIME, GDT_VALID, &tm);

[LarryMc]

I try to addcontrol this but nothing appears, I also tried to create it with cdtpicker.create but it doesn't work

Show your code and someone will try to help you.

Larry

[ludovico]

I think that it is cause that I try to add this into a MDIChild window

[ludovico]

No problem, MonthCal works