我目前的需求是想要由程式開啟一個已經加密的pdf檔
也就是打開時需要輸入密碼才行
現在的進度已經到可以取得那個輸入密碼edit的classname了，
但是不知道如何由程式輸入字串到那個edit，請教各位先進，謝謝

以下是我目前的程式碼


[code cpp]
void __fastcall TForm1::Button1Click(TObject *Sender)
{
ShellExecute(Handle,"open","c:\\a.pdf",NULL,NULL,SW_MAXIMIZE);
Sleep(2000);

HWND h = ::FindWindow(NULL,"密碼");
if (h != 0)
EnumChildWindows(h, reinterpret_cast (EnumChildProc), 0);
}
//---------------------------------------------------------------------------

HANDLE hArray[10];
int Count = 0;

bool CALLBACK EnumChildProc(HWND h, LPARAM a)
{
char classname[128];
ZeroMemory(classname,128);
GetClassName(h,classname,128);

if (AnsiString(classname) == "RICHEDIT50W")
hArray[Count ] = h;

return true;
}
//---------------------------------------------------------------------------
[/code]

編輯記錄

PostMessage or SendMessage可以嗎?

先取得Handle 再使用PostMessage就可以解決了 


[code cpp]
void __fastcall TForm1::Button1Click(TObject *Sender)
{
ShellExecute(Handle,"open","c:\\a.pdf",NULL,NULL,SW_MAXIMIZE);
Sleep(1000);

HWND LastEditHandle = ::GetForegroundWindow();
AttachThreadInput(GetCurrentThreadId(), GetWindowThreadProcessId
(LastEditHandle, NULL), true);
HWND hFocusWin = GetFocus();
AttachThreadInput(GetCurrentThreadId(), GetWindowThreadProcessId
(LastEditHandle, NULL), false);

int i;
Byte ch;
AnsiString str = "參考看看";

for( i = 1; i <= str.Length(); i )
{
ch = Byte(str[i]);

if( IsDBCSLeadByte(ch) )
PostMessage(hFocusWin, WM_IME_CHAR, MAKEWORD(Byte(str[ i]), ch), 0);
else
PostMessage(hFocusWin, WM_IME_CHAR, WORD(ch), 0);
}
}
[/code]