SendMessage WM_CHAR 如何确保重复的字符串被对方窗口接收到

[纠结的程序猿]

我通过下面的代码打开一个CMD窗口，然后通过SendMessage向这个CMD窗口发送字符串。
但是当CMD窗口比较忙得时候，在发送几个连续的字符时，会有字符丢失。
比如，发送这样一个字符串“dddd”，CMD窗口中只收到了两个或三个'd'。
可能CMD窗口在忙得时候会把相同的WM_CHAR消息合并，导致字符丢失。
我尝试使用Sleep去睡几百毫秒，但是不能从根本上解决问题。仍然会有字符丢失。
如何确保重复的字符串被对方窗口接收到？

DWORD g_nCmdProcessID = -1;
HWND g_hwndCmdProcess = NULL;

BOOL CALLBACK EnumCMDProcess(HWND hwnd, LPARAM lParam) 
{ 
	CWindow myWindow;
	myWindow.Attach(hwnd);
	if(g_nCmdProcessID == myWindow.GetWindowProcessID())
	{
		g_hwndCmdProcess = hwnd;
	}
	return TRUE; 
}


void CDlgFileString::OnStringRunincommandwindow()
{
	// TODO: Add your command handler code here
	STARTUPINFO si;
	PROCESS_INFORMATION pi;

	ZeroMemory( &si, sizeof(si) );
	si.cb = sizeof(si);
	ZeroMemory( &pi, sizeof(pi) );

	TCHAR wszCmdLine[100] = _T("cmd");

	// Start the child process. 
	if( !CreateProcess( NULL,   // No module name (use command line). 
		wszCmdLine, // Command line. 
		NULL,             // Process handle not inheritable. 
		NULL,             // Thread handle not inheritable. 
		FALSE,            // Set handle inheritance to FALSE. 
		0,                // No creation flags. 
		NULL,             // Use parent's environment block. 
		NULL,             // Use parent's starting directory. 
		&si,              // Pointer to STARTUPINFO structure.
		&pi )             // Pointer to PROCESS_INFORMATION structure.
		) 
	{
		return;
	}

	g_nCmdProcessID = pi.dwProcessId;
	g_hwndCmdProcess = NULL;

	for(int nWaitCmdWndTimes = 0; nWaitCmdWndTimes < 3; nWaitCmdWndTimes++)
	{
		if(g_hwndCmdProcess == NULL)
		{
			EnumWindows(EnumCMDProcess, 0);
			if(g_hwndCmdProcess != NULL)
			{

				CFrameWnd * pFrameWnd = ((CMainFrame *)AfxGetMainWnd())->GetActiveFrame();
				if(pFrameWnd != NULL && (pFrameWnd->GetActiveView() != NULL))
				{
					CString sFileName = ((CCodeLogicDoc *)(pFrameWnd->GetActiveView()->GetDocument()))->GetDocID();
					int nStartIndex = 0;
					for(int i = 0; i < sFileName.GetLength() - 1; i++)
					{
						if(sFileName.GetAt(i) == _T('/') || sFileName.GetAt(i) == _T('\\'))
						{
							nStartIndex = i + 1;
						}
					}
					CString sPathName = sFileName.Left(nStartIndex - 1);
					CString sFileNameFull = sFileName.Right(sFileName.GetLength() - nStartIndex);

					sFileName = sFileNameFull;
					nStartIndex = 0;
					for(int i = 0; i < sFileName.GetLength() - 1; i++)
					{
						if(sFileName.GetAt(i) == _T('.') || sFileName.GetAt(i) == _T('.'))
						{
							nStartIndex = i + 1;
						}
					}
					if(nStartIndex > 0)
					{
						sPathName = sFileName.Right(sFileName.GetLength() - nStartIndex);
					}

					CString sValue;
					CString sValueAfter;
					int nCategoryIndex = this->m_comboCatalog.GetCurSel();

					if(CDlgStringTableManager::m_ptrArrayName.GetSize() > nCategoryIndex)
					{
						CWordArray * pstringArrayCursorPos = (CWordArray *)CDlgStringTableManager::m_ptrArrayCursorPos.GetAt(nCategoryIndex);
						CStringArray * pstringArrayValue = (CStringArray *)CDlgStringTableManager::m_ptrArrayValue.GetAt(nCategoryIndex);
						CStringArray * pstringArrayInsertAfter = (CStringArray *)CDlgStringTableManager::m_ptrArrayInsertAfter.GetAt(nCategoryIndex);

						int nListIndex = m_listString.GetCurSel();
						if(pstringArrayValue->GetSize() > nListIndex)
						{
							unsigned int nCursorPos = pstringArrayCursorPos->GetAt(nListIndex);
							BOOL bRemoveSelection = nCursorPos > 0 ? TRUE : FALSE;
							sValue = pstringArrayValue->GetAt(nListIndex);
							sValueAfter = pstringArrayInsertAfter->GetAt(nListIndex);
						}
					}

					_snwprintf_s(CGlobalComponent::m_wszTempBuffer, LENGTH_MAX_BUFF, LENGTH_MAX_BUFF, _T("set cp = %s\r\nset cf = %s\r\nset cffull = %s\r\n%s"), sPathName, sFileName, sFileNameFull, sValue);

					for(int i = 0; i < (int)wcslen(CGlobalComponent::m_wszTempBuffer); i++)
					{
						LRESULT lResult = ::SendMessage(g_hwndCmdProcess, WM_CHAR, CGlobalComponent::m_wszTempBuffer[i], 1);
						TRACE(_T("\n%d"), lResult);
					}

				}
				break;
			}
		}
		Sleep(200);
	}
}

[纠结的程序猿]

[Quote=引用 2 楼 xwsn007 的回复:]
C/C++ codefor(int i=0; i< (int)wcslen(CGlobalComponent::m_wszTempBuffer); i++)
{
LRESULT lResult= ::SendMessage(g_hwndCmdProcess, WM_CHAR, CGlobalComponent::m_wszTempBuffer[i],1);
TRACE(_T("\n%d"), lResult);
Sleep(100);
}
[/Quote]
这个方法我试过，不行

[纠结的程序猿]

[Quote=引用 3 楼 ylmbtm 的回复:]
楼上正解，可以从消息得到重复的次数,
wParam
Specifies the character code of the key.
lParam
Specifies the repeat count, scan code, extended-key flag, context code, previous key-state flag, and transition-state flag, as shown in the following table.
0-15
Specifies the repeat count for the current message. The value is the number of times the keystroke is autorepeated as a result of the user holding down the key. If the keystroke is held long enough, multiple messages are sent. However, the repeat count is not cumulative.
16-23
Specifies the scan code. The value depends on the OEM.
24
Specifies whether the key is an extended key, such as the right-hand ALT and CTRL keys that appear on an enhanced 101- or 102-key keyboard. The value is 1 if it is an extended key; otherwise, it is 0.
25-28
Reserved; do not use.
29
Specifies the context code. The value is 1 if the ALT key is held down while the key is pressed; otherwise, the value is 0.
30
Specifies the previous key state. The value is 1 if the key is down before the message is sent, or it is 0 if the key is up.
31
Specifies the transition state. The value is 1 if the key is being released, or it is 0 if the key is being pressed.

[/Quote]
让我回去试试再说。
如果重复的字符个数超过15怎么办？

[dirdirdir3]

那试一试postmessage或者kb_event,不行就没什么办法了........

[MoXiaoRab]

WM_KEYUP
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN

[MoXiaoRab]

顺序写反了

应该是
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYUP

绝对可行

[纠结的程序猿]

[Quote=引用 9 楼 tr0j4n 的回复:]
顺序写反了

应该是
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYUP

绝对可行
[/Quote]
多谢

[纠结的程序猿]

[Quote=引用 9 楼 tr0j4n 的回复:]
顺序写反了

应该是
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYUP

绝对可行
[/Quote]
还有个问题，WM_KEYDOWN和WM_KEYUP发送的值是扫描码吗？我怎么获得一个char的扫描码？
如果这个char是汉字呢？

[纠结的程序猿]

顶一下

[纠结的程序猿]

顶一下

[MoXiaoRab]

发送的是ASCII，不是扫描码。汉字一样发

 PostMessage(Handle,WM_CHAR,(WPARAM)(0xBD),0); 

这样发送的就是一个汉字

[MoXiaoRab]

还有种方法是通过WM_IME_CHAR

一次发的是一个CHAR，而汉字是2个char，因此需要发两次！

char *src="我爱你LZ，快把分给我";   
for(int i=0;i<strlen(src);i++)   
   SendMessage(Handle,WM_IME_CHAR,src[i],0);  

[MoXiaoRab]

[Quote=引用 22 楼 pilotedit 的回复:]
引用 17 楼 tr0j4n 的回复:
看你的代码，你没按照我说的做。

WM_KEYDOWN和WM_KEYUP怎么发过去？发什么值？（直接发字符值是肯定不行的，你在OnKeyDown函数中得到的不是字符值）
[/Quote]
发ASCII，该怎么发怎么发

[纠结的程序猿]

那么WM_KEYDOWN和WM_KEYUP发送的值呢？

[纠结的程序猿]

[Quote=引用 9 楼 tr0j4n 的回复:]
顺序写反了

应该是
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYUP

绝对可行
[/Quote]
这个方法好像还是不可以，不知道是不是我什么地方处理错误：

//::SendMessage(g_hwndCmdProcess, WM_KEYDOWN, CGlobalComponent::m_wszTempBuffer[i], 1);
LRESULT lResult = ::SendMessage(g_hwndCmdProcess, WM_CHAR, CGlobalComponent::m_wszTempBuffer[i], 4);
::SendMessage(g_hwndCmdProcess, WM_KEYUP, 0, 1);

[MoXiaoRab]

看你的代码，你没按照我说的做。

[纠结的程序猿]

[Quote=引用 13 楼 tr0j4n 的回复:]
发送的是ASCII，不是扫描码。汉字一样发

C/C++ code PostMessage(Handle,WM_CHAR,(WPARAM)(0xBD),0);

这样发送的就是一个汉字
[/Quote]
首先Post Message我试过不行，效果和SendMessage一样，还不如SendMessage。

[纠结的程序猿]

[Quote=引用 14 楼 tr0j4n 的回复:]
还有种方法是通过WM_IME_CHAR

一次发的是一个CHAR，而汉字是2个char，因此需要发两次！
C/C++ codechar*src="我爱你LZ，快把分给我";for(int i=0;i<strlen(src);i++)
SendMessage(Handle,WM_IME_CHAR,src[i],0);
[/Quote]

这种发法在重复的时候仍然会丢掉部分重复的字符。

[纠结的程序猿]

[Quote=引用 17 楼 tr0j4n 的回复:]
看你的代码，你没按照我说的做。
[/Quote]
具体应该怎么做？

[MoXiaoRab]

WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYDOWN
WM_CHAR
WM_KEYUP

7次SendMessage

[纠结的程序猿]

[Quote=引用 17 楼 tr0j4n 的回复:]
看你的代码，你没按照我说的做。
[/Quote]
WM_KEYDOWN和WM_KEYUP怎么发过去？发什么值？（直接发字符值是肯定不行的，你在OnKeyDown函数中得到的不是字符值）