delphi Program Name、Process ID、Window Handle、Process Handle 的转换函数

// Get ProcessID By ProgramName (Include Path or Not Include)
function GetPIDByProgramName(const APName: string): THandle;
// Get Window Handle By ProgramName (Include Path or Not Include)
function GetHWndByProgramName(const APName: string): THandle;
// Get Window Handle By ProcessID
function GetHWndByPID(const hPID: THandle): THandle;
// Get ProcessID By Window Handle
function GetPIDByHWnd(const hWnd: THandle): THandle;
// Get Process Handle By Window Handle
function GetProcessHndByHWnd(const hWnd: THandle): THandle;
// Get Process Handle By Process ID
function GetProcessHndByPID(const hAPID: THandle): THandle;

// Get Window Handle By ProgramName (Include Path or Not Include)
function GetHWndByProgramName(const APName: string): THandle;
begin
Result:=GetHWndByPID(GetPIDByProgramName(APName));
end;

// Get Process Handle By Window Handle
function GetProcessHndByHWnd(const hWnd: THandle): THandle;
var
PID: DWORD;
AhProcess: THandle;
begin
if hWnd<>0 then
begin
GetWindowThreadProcessID(hWnd, @PID);
AhProcess := OpenProcess(PROCESS_ALL_ACCESS, false, PID);
Result:=AhProcess;
CloseHandle(AhProcess);
end
else
Result:=0;
end;

// Get Process Handle By Process ID
function GetProcessHndByPID(const hAPID: THandle): THandle;
var
AhProcess: THandle;
begin
if hAPID<>0 then
begin
AhProcess := OpenProcess(PROCESS_ALL_ACCESS, false, hAPID);
Result:=AhProcess;
CloseHandle(AhProcess);
end
else
Result:=0;
end;

// Get Window Handle By ProcessID
function GetPIDByHWnd(const hWnd: THandle): THandle;
var
PID: DWORD;
begin
if hWnd<>0 then
begin
GetWindowThreadProcessID(hWnd, @PID);
Result:=PID;
end
else
Result:=0;
end;

// Get Window Handle By ProcessID
function GetHWndByPID(const hPID: THandle): THandle;
type
PEnumInfo = ^TEnumInfo;
TEnumInfo = record
ProcessID: DWORD;
HWND: THandle;
end;

function EnumWindowsProc(Wnd: DWORD; var EI: TEnumInfo): Bool; stdcall;
var
PID: DWORD;
begin
GetWindowThreadProcessID(Wnd, @PID);
Result := (PID <> EI.ProcessID) or
(not IsWindowVisible(WND)) or
(not IsWindowEnabled(WND));

if not Result then EI.HWND := WND; //break on return FALSE 所以要反向檢查
end;

function FindMainWindow(PID: DWORD): DWORD;
var
EI: TEnumInfo;
begin
EI.ProcessID := PID;
EI.HWND := 0;
EnumWindows(@EnumWindowsProc, Integer(@EI));
Result := EI.HWND;
end;
begin
if hPID<>0 then
Result:=FindMainWindow(hPID)
else
Result:=0;
end;

// Get ProcessID By ProgramName (Include Path or Not Include)
function GetPIDByProgramName(const APName: string): THandle;
var
isFound: boolean;
AHandle, AhProcess: THandle;
ProcessEntry32: TProcessEntry32;
APath: array[0..MAX_PATH] of char;
begin
try
Result := 0;
AHandle := CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
ProcessEntry32.dwSize := Sizeof(ProcessEntry32);
isFound := Process32First(AHandle, ProcessEntry32);

while isFound do
begin
AhProcess := OpenProcess(PROCESS_QUERY_INFORMATION or PROCESS_VM_READ,
false, ProcessEntry32.th32ProcessID);
GetModuleFileNameEx(AhProcess, 0, @APath[0], sizeof(APath));

if (UpperCase(StrPas(APath)) = UpperCase(APName)) or
(UpperCase(StrPas(ProcessEntry32.szExeFile)) = UpperCase(APName)) then
begin
Result := ProcessEntry32.th32ProcessID;
break;
end;
isFound := Process32Next(AHandle, ProcessEntry32);
CloseHandle(AhProcess);
end;
finally
CloseHandle(AHandle);
end;
end;

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