Delphi as a new Windows programming language due to its set
Many excellent features are more and more professionals and
The favor of enthusiasts. The following ten skills involved is relatively wide, hoping
It is beneficial to Delphi's enthusiasts.
1. Similar to VB. DOEvents function.
Everyone may find that there is no similar to VB in Delphi. DOEV
ENTS function, so sometimes we will not respond to Windows
A simultaneous event. In fact, in Delphi Application Object
Including a similar method: ProcessMessage, you can pass
Use Application. ProcessMessage to complete like VB. DOEVE
NTS is the same function.
2. Call NetscapeAvigator in Delphi.
As the Internet is hot, have you ever thought about your Delphi program?
Start the Netscape browser to display the homepage of the WWW address you specify
. The following program can complete this feature.
Programnetscape;
Usesddeman;
Procedurego-Tourl (SURL: String);
VAR
DDE: TDDECLIENTCONV;
Begin
DDE: κTDDECLIENTCONV. Create (nil);
Withddo
Begin
// SpecifyThelocationOfnetScape. EXE
ServiceApplication: κ'c: ιns32ιprogramιne
Tscape. EXE ';
// ActivateThenetscapeAvigator
SetLink ('netscape', 'www-activate');
RequestData ('0xffffffff);
// gotothespecifiedurl
SetLink ('Netscape', 'WWW-OpenURL');
RequestData (SURL ', 0xffffffff, 0x3 ,,,
');
Closelink;
END;
DDE. FREE;
END;
Begin
Gotourl ('http://www.yahoo.com/');
End.
3. Format integer output.
The more large numbers are not easy to read during output, in Delphi
The number showing the nodes is quite simple, as follows: XX
XXX. Caption: κ millmatfloat ('#', 524667500).
4. Get a prompt at compile.
In Delphi2.0, you can let the compiler tell you some time
Tip, such as which variables are declared, but they have never used it. We know that you can control whether Delphi is going to do through the options in the menu.
But if you need DE as you specify due to some special needs
What should I do with LPHI? Please refer to the following program.
{$ Hinton}
Proceduretform1. Button1click (Sender: Tobject
);
VAR
X: integer;
Begin
END;
{$ Hintoff}
5. Change wallpaper of Windows95.
In Delphi, you can easily change wallpapers, please refer to the following
program.
Procedurechangeit;
VAR
REG: TREGINIFILE;
Begin
Κtreginifile. Create ('ControlPanel')
;
REG. Writestring ('Desktop', 'Wallpaper ",
'C: ιPWIN95ιFOR EST. BMP ');
REG. Writestring ('Desktop', 'TileWallpaper
','1');
REG. FREE;
SystemParametersInfo (Spi-setDeskWallpaper, 0
, NIL, SPIF-SendwiniChange;
END;
6. Get the date of the last use of the file.
There is a new feature in Win95, which is to get access files.
The last date. The famous CleansweapForWin95 software is relying on this
One function is one of the basis for judging whether a file is often accessed.
In Delphi, we can reach this through the following programs.
FunctionGetfilelastic (SFileName: stri)
NG): TDATE-TIME;
VAR
FFD: twin32finddata;
DFT: DWORD;
LFT: TFileTime;
H: Thandle;
Begin
// getFileinformation
H: κwindows. Findfirstfile (pchar (sfilename)
), Ffd);
IF (Invalid-Handle-Valueιλh) THEN
Begin
// We'Relookingforjustonefile, SoCloseour "F
IND "
WINDOWS. FindClose (h);
// convertthefiletimetolocalfiletime
FiletimetolocalFiletime (ffd.ftlastaccesstime, LFT);
// ConvertFileTimetodostime
FiletimetodosDatetime (LFT, longrec (dft) .hi
LongRec (DFT). LO);
// Finally, ConvertDostimetdatetimeforusein
Delphi'snativeDate / TimeFunctions
Result: filedatetodatetime (DFT);
END;
END;
GetFilelasticAccesstime () will take Delphi TDateTi
The ME format returns the last accessed date of the file you specified.
7. Colorful labels.
We are not satisfied with the simple label provided by Delphi, can
There are different fonts in the label, there are different colors to enrich us.
Performance. The answer is yes, and does not include the control of the third party
Part, we only need to use the trichedit that delphi yourself.
Yes. First remove the border of the trichedit control: riched -it1
. Borderstyle: κBsnone; simultaneous setting of read-only properties true: Rich
Edit1. Readonly: κtrue; then, you use Write and the like
Software makes text in RichText format, can be displayed by the following statement
Showed:
Richedit1. PlainText: κfalse;
Richedit1. Lines. LoadFromfile ('c: TEST.R
TF ');
8. How to prevent Win95 from displaying serious errors.
No matter how your program repeatedly debugged, after handing over to the user, there is always
How can you happen unexpected mistakes, how to avoid Win95 display over white
The window tells you that the user has an embarrassment error? We can
this way:
VAR
Wolderror mode: word;
Begin
// TellWin-DowstoIgnorecriprRiticalerRorsandsave
CurRenterrorMode
Wolderror-Mode: κseterrorMode (SEM-Failcr)
Iti -calerrors);
Try
// CodetHatmightGenerateAcriticalerrorGoesher
e. . .
Finally
// gobacktopreviouserrormode
SETERRORMODE (WolderRormode);
END;
END;
It is mainly to use setErrorMode () to complete this feature.
9. Which object is just hit using a mouse.
In Win95, the right button of the mouse has played a lot, but due to historical reasons, even in Delphi, it is also in Delphi due to historical reasons.
Not valid enough, the following program can tell you how to know the right mouse
Object name. First create a popmenu, then the following code can be
Tell you the object name just right-click: Popupmenu1. Popuppcom
Ponent. Classname.
10. Detect whether the CD-ROM or other disks has changed.
The simplest method of checking if the CD-ROM or the disk has changed
It is checking its Volume number. You can simply use the following functions to return
Back to disk Volume series number getDiskvolserialid ('e'),
The function code is as follows:
FunctiongetDiskvolserialId (CDRIVENAME: CHAR)
: Dword;
VAR
DWTEMP1, DWTEMP2: DWORD;
Begin
GetVolumeInformation (Pchar (CDRIVENAME ":
ι '),
NIL,
0,
ΝResult,
DWTEMP2,
DWTEMP2,
NIL,
0);
END;
