if EnumError = NO_ERROR then begin WorkGroupEntries := MaxEntries; EnumBufferLength := SizeOf(EnumWorkGroupBuffer); EnumError := WNetEnumResource(EnumWorkGroupHandle, WorkGroupEntries, @EnumWorkGroupBuffer, EnumBufferLength);
if EnumError = NO_ERROR then begin for I := 1 to WorkGroupEntries do begin EnumError := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, 0, @EnumWorkGroupBuffer[I], EnumComputerHandle); if EnumError = NO_ERROR then begin ComputerEntries := MaxEntries; EnumBufferLength := SizeOf(EnumComputerBuffer); EnumError := WNetEnumResource(EnumComputerHandle, ComputerEntries, @EnumComputerBuffer, EnumBufferLength); if EnumError = NO_ERROR then for J := 1 to ComputerEntries do Computers.Add(Copy(EnumComputerBuffer[J].lpRemoteName, 3, Length(EnumComputerBuffer[J].lpRemoteName) - 2)); WNetCloseEnum(EnumComputerHandle); end; end; end; WNetCloseEnum(EnumWorkGroupHandle); end;
if EnumError = ERROR_NO_MORE_ITEMS then EnumError := NO_ERROR; Result := EnumError;
end;
initialization
Computers := TStringList.Create;
finalization
Computers.Free;
end. 如何查找工作组中所有计算机? 回答:
var Computer : Array[1..500] of String[25]; ComputerCount : Integer;
procedure FindAllComputers(Workgroup : String); Var EnumHandle : THandle; WorkgroupRS : TNetResource; Buf : Array[1..500] of TNetResource; BufSize : Integer; Entries : Integer; Result : Integer;
begin ComputerCount := 0;
Workgroup := Workgroup + #0;
FillChar(WorkgroupRS, SizeOf(WorkgroupRS) , 0); With WorkgroupRS do begin dwScope := 2; dwType := 3; dwDisplayType := 1; dwUsage := 2; lpRemoteName := @Workgroup[1]; end;
Result := WNetEnumResource( EnumHandle, Entries, @Buf, BufSize ); If (Result = NO_ERROR) and (Entries = 1) then begin Inc( ComputerCount ); Computer[ ComputerCount ] := StrPas(Buf[1].lpRemoteName); end; Until (Entries <> 1) or (Result <> NO_ERROR);
WNetCloseEnum( EnumHandle ); end; { Find All Computers }
如何使用WinAPI来查找LAN中所有的计算机?
回答:
调用FindComputers,返回WinAPI错误代码(如果有的话)。这个函数将会在TStringList类型的Computers对象中填入计算机名称。
以下代码是在Delphi5上开发的,但是应该是向后兼容的。
Answer:
unit FindComp;
interface
uses
Windows, Classes;
function FindComputers: DWORD;
var
Computers: TStringList;
implementation
uses
SysUtils;
const
MaxEntries = 250;
function FindComputers: DWORD;
var
EnumWorkGroupHandle, EnumComputerHandle: THandle;
EnumError: DWORD;
Network: TNetResource;
WorkGroupEntries, ComputerEntries: DWORD;
EnumWorkGroupBuffer, EnumComputerBuffer: array[1..MaxEntries] of TNetResource;
EnumBufferLength: DWORD;
I, J: DWORD;
begin
Computers.Clear;
FillChar(Network, SizeOf(Network), 0);
with Network do
begin
dwScope := RESOURCE_GLOBALNET;
dwType := RESOURCETYPE_ANY;
dwUsage := RESOURCEUSAGE_CONTAINER;
end;
EnumError := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, 0, @Network, EnumWorkGroupHandle);
if EnumError = NO_ERROR then
begin
WorkGroupEntries := MaxEntries;
EnumBufferLength := SizeOf(EnumWorkGroupBuffer);
EnumError := WNetEnumResource(EnumWorkGroupHandle, WorkGroupEntries, @EnumWorkGroupBuffer, EnumBufferLength);
if EnumError = NO_ERROR then
begin
for I := 1 to WorkGroupEntries do
begin
EnumError := WNetOpenEnum(RESOURCE_GLOBALNET, RESOURCETYPE_ANY, 0, @EnumWorkGroupBuffer[I], EnumComputerHandle);
if EnumError = NO_ERROR then
begin
ComputerEntries := MaxEntries;
EnumBufferLength := SizeOf(EnumComputerBuffer);
EnumError := WNetEnumResource(EnumComputerHandle, ComputerEntries, @EnumComputerBuffer, EnumBufferLength);
if EnumError = NO_ERROR then
for J := 1 to ComputerEntries do
Computers.Add(Copy(EnumComputerBuffer[J].lpRemoteName, 3, Length(EnumComputerBuffer[J].lpRemoteName) - 2));
WNetCloseEnum(EnumComputerHandle);
end;
end;
end;
WNetCloseEnum(EnumWorkGroupHandle);
end;
if EnumError = ERROR_NO_MORE_ITEMS then
EnumError := NO_ERROR;
Result := EnumError;
end;
initialization
Computers := TStringList.Create;
finalization
Computers.Free;
end.
如何查找工作组中所有计算机?
回答:
var
Computer : Array[1..500] of String[25];
ComputerCount : Integer;
procedure FindAllComputers(Workgroup : String);
Var
EnumHandle : THandle;
WorkgroupRS : TNetResource;
Buf : Array[1..500] of TNetResource;
BufSize : Integer;
Entries : Integer;
Result : Integer;
begin
ComputerCount := 0;
Workgroup := Workgroup + #0;
FillChar(WorkgroupRS, SizeOf(WorkgroupRS) , 0);
With WorkgroupRS do begin
dwScope := 2;
dwType := 3;
dwDisplayType := 1;
dwUsage := 2;
lpRemoteName := @Workgroup[1];
end;
WNetOpenEnum( RESOURCE_GLOBALNET,
RESOURCETYPE_ANY,
0,
@WorkgroupRS,
EnumHandle );
Repeat
Entries := 1;
BufSize := SizeOf(Buf);
Result :=
WNetEnumResource( EnumHandle,
Entries,
@Buf,
BufSize );
If (Result = NO_ERROR) and (Entries = 1) then begin
Inc( ComputerCount );
Computer[ ComputerCount ] := StrPas(Buf[1].lpRemoteName);
end;
Until (Entries <> 1) or (Result <> NO_ERROR);
WNetCloseEnum( EnumHandle );
end; { Find All Computers }