使用GetFileVersionInfo 得到版本信息的例子
Samples Using GetFileVersionInfo?
回答1:
procedure GetBuildInfo(var V1, V2, V3, V4: Word);
var
VerInfoSize: DWORD;
VerInfo: Pointer;
VerValueSize: DWORD;
VerValue: PVSFixedFileInfo;
Dummy: DWORD;
begin
VerInfoSize := GetFileVersionInfoSize(PChar(ParamStr(0)), Dummy);
GetMem(VerInfo, VerInfoSize);
GetFileVersionInfo(PChar(ParamStr(0)), 0, VerInfoSize, VerInfo);
VerQueryValue(VerInfo, \'\\\', Pointer(VerValue), VerValueSize);
with VerValue^ do
begin
V1 := dwFileVersionMS shr 16;
V2 := dwFileVersionMS and $FFFF;
V3 := dwFileVersionLS shr 16;
V4 := dwFileVersionLS and $FFFF;
end;
FreeMem(VerInfo, VerInfoSize);
end;
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回答2
If you want a component, check out TVersionInfoResource at
delphi/\">http://www.pobox.com/~bstowers/delphi/ in the My Stuff section. D1/D2/D3/C++B
compatible, freeware with full source code and a small demo.
And you can see the delphi/\">http://www.aye.net/~bstowers/delphi/
另一个component VersionInfo.zip
防止程序运行多个例程?
More than one instance of program?
回答
This is copied direct from my *.dpr file. You can work it for your own
use.
var
hMutex : Thandle;
WaitResult : word;
BroadcastList : DWORD;
begin
MessageID := RegisterWindowMessage(\'Check For Choice Previous Inst\');
// register a message to use later on
hMutex := createMutex(nil,false,pchar(\'App_Choice\')); // grab a mutex
handle
WaitResult := WaitForSingleObject(hMutex,10); // wait to see
if we can have exclusive use of the mutex
if ( waitResult = WAIT_TIMEOUT ) then // if we can\'t then broadcast
the message to make the owner of the mutex respond
{ request that the running application takes focus }
begin
BroadcastList := BSM_APPLICATIONS;
BroadcastSystemMessage(
BSF_POSTMESSAGE,@BroadcastList,MessageID,0,0); file://32 bit - broadcast the
message to all apps - only a prev inst will hear it.
end
else
begin
{ do the normal stuff}
Application.Title := \'Choice Organics Purchase & Sales System\';
Application.CreateForm(TMainForm, MainForm);
Application.Run;
ReleaseMutex(hMutex); // release the mutex as a politeness
end;
CloseHandle(hMutex); // close the mutex handle
end.
This goes in the MainForm
procedure Tmainform.OnAppMessage(var Msg : TMsg ; Var Handled : Boolean);
begin
{ If it\'s the special message then focus on this window}
if Msg.Message = MessageID then // if we get the broadcast message from an
another instance of this app that is trying to start up
begin
show;
WindowState := wsMaximized;
BringToFront;
SetFocus;
Handled := true;
end;
end;
file://And this goes in the TMainForm.FormCreate ;-
Application.OnMessage:= OnAppMessage;
4.得到Win 95 的计算机名字?
问 How can I learn Windows\'95 Machine Name?
答function ComputerName : String;
var
CNameBuffer : PChar;
fl_loaded : Boolean;
CLen : ^DWord;
begin
GetMem(CNameBuffer,255);
New(CLen);
CLen^:= 255;
fl_loaded := GetComputerName(CNameBuffer,CLen^);
if fl_loaded then
ComputerName := StrPas(CNameBuffer)
else
ComputerName := \'Unkown\';
FreeMem(CNameBuffer,255);
Dispose(CLen);
end;
责任编辑：小草
