Question

delphi编程中如何终止或暂停一个进程.

Answer 1

unit Tlhelp323;

interface

uses
Windows,SysUtils,Tlhelp32;

function KillTask(ExeFileName: string): Integer; //关闭进程
function EnableDebugPrivilege: Boolean; //提升权限
function FindProcessId(ExeFileName: string):THandle; //查找进程

implementation

function FindProcessId(ExeFileName: string):THandle;
var
ContinueLoop:BOOL;
FSnapshotHandle:THandle;
FProcessEntry32:TProcessEntry32;
begin
result:=0;
FSnapshotHandle:=CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);
FProcessEntry32.dwSize:=Sizeof(FProcessEntry32);
ContinueLoop:=Process32First(FSnapshotHandle,FProcessEntry32);
while integer(ContinueLoop)<>0 do
begin
if UpperCase(FProcessEntry32.szExeFile)=UpperCase(ExeFileName) then
begin
result:=FProcessEntry32.th32ProcessID;
break;
end;
ContinueLoop:=Process32Next(FSnapshotHandle,FProcessEntry32);
end;
CloseHandle (FSnapshotHandle);
end;

function KillTask(ExeFileName: string): Integer;
const
PROCESS_TERMINATE = $0001;
var
ContinueLoop: boolean;
FSnapshotHandle: THandle;
FProcessEntry32: TProcessEntry32;
begin
Result := 0;
FSnapshotHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
FProcessEntry32.dwSize := SizeOf(FProcessEntry32);
ContinueLoop := Process32First(FSnapshotHandle, FProcessEntry32);

while Integer(ContinueLoop) <> 0 do
begin
if ((UpperCase(ExtractFileName(FProcessEntry32.szExeFile)) =
UpperCase(ExeFileName)) or (UpperCase(FProcessEntry32.szExeFile) =
UpperCase(ExeFileName))) then
Result := Integer(TerminateProcess(
OpenProcess(PROCESS_TERMINATE,
BOOL(0),
FProcessEntry32.th32ProcessID),
0));
ContinueLoop := Process32Next(FSnapshotHandle, FProcessEntry32);
end;
CloseHandle(FSnapshotHandle);
end;

//但是对于服务程序,它会提示"拒绝访问".其实只要程序拥有Debug权限即可:
function EnableDebugPrivilege: Boolean;
function EnablePrivilege(hToken: Cardinal; PrivName: string; bEnable: Boolean): Boolean;
var
TP: TOKEN_PRIVILEGES;
Dummy: Cardinal;
begin
TP.PrivilegeCount := 1;
LookupPrivilegeValue(nil, pchar(PrivName), TP.Privileges[0].Luid);
if bEnable then
TP.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED
else TP.Privileges[0].Attributes := 0;
AdjustTokenPrivileges(hToken, False, TP, SizeOf(TP), nil, Dummy);
Result := GetLastError = ERROR_SUCCESS;
end;
var
hToken: Cardinal;
begin
OpenProcessToken(GetCurrentProcess, TOKEN_ADJUST_PRIVILEGES, hToken);
result:=EnablePrivilege(hToken, 'SeDebugPrivilege', True);
CloseHandle(hToken);
end;

end.

使用的时候先EnableDebugPrivilege提升权限，然后KillTask(ExeFileName: string)