CreateProcess
以下函式封裝了使用 CreateProcess Windows API 啟動其他程式的程式碼。
它是可配置的，可以等到呼叫程序完成或立即返回。
引數：
FileName- 可執行檔案的完整路徑Params- 命令列引數或使用空字串Folder- 被呼叫程式的工作資料夾 - 如果從FileName中提取空路徑WaitUntilTerminated- 如果 true 函式將等待程序完成執行WaitUntilIdle- 如果 true 函式將呼叫 WaitForInputIdle 函式並等待指定的程序完成處理其初始輸入，直到沒有使用者輸入掛起RunMinimized- 如果真正的過程將最小化執行ErrorCode- 如果函式失敗，則會包含遇到的 Windows 錯誤程式碼
function ExecuteProcess(const FileName, Params: string; Folder: string; WaitUntilTerminated, WaitUntilIdle, RunMinimized: boolean;
var ErrorCode: integer): boolean;
var
CmdLine: string;
WorkingDirP: PChar;
StartupInfo: TStartupInfo;
ProcessInfo: TProcessInformation;
begin
Result := true;
CmdLine := '"' + FileName + '" ' + Params;
if Folder = '' then Folder := ExcludeTrailingPathDelimiter(ExtractFilePath(FileName));
ZeroMemory(@StartupInfo, SizeOf(StartupInfo));
StartupInfo.cb := SizeOf(StartupInfo);
if RunMinimized then
begin
StartupInfo.dwFlags := STARTF_USESHOWWINDOW;
StartupInfo.wShowWindow := SW_SHOWMINIMIZED;
end;
if Folder <> '' then WorkingDirP := PChar(Folder)
else WorkingDirP := nil;
if not CreateProcess(nil, PChar(CmdLine), nil, nil, false, 0, nil, WorkingDirP, StartupInfo, ProcessInfo) then
begin
Result := false;
ErrorCode := GetLastError;
exit;
end;
with ProcessInfo do
begin
CloseHandle(hThread);
if WaitUntilIdle then WaitForInputIdle(hProcess, INFINITE);
if WaitUntilTerminated then
repeat
Application.ProcessMessages;
until MsgWaitForMultipleObjects(1, hProcess, false, INFINITE, QS_ALLINPUT) <> WAIT_OBJECT_0 + 1;
CloseHandle(hProcess);
end;
end;
使用上述功能
var
FileName, Parameters, WorkingFolder: string;
Error: integer;
OK: boolean;
begin
FileName := 'C:\FullPath\myapp.exe';
WorkingFolder := ''; // if empty function will extract path from FileName
Parameters := '-p'; // can be empty
OK := ExecuteProcess(FileName, Parameters, WorkingFolder, false, false, false, Error);
if not OK then ShowMessage('Error: ' + IntToStr(Error));
end;