// Helper override to handle common scenario of having a string lParam
// Handles bi-directional string marshaling
internal static bool XSend (IntPtr hwnd, int uMsg, IntPtr wParam, ref string str, int maxLength)
{
using (SafeProcessHandle hProcess = new SafeProcessHandle(hwnd))
{
if (hProcess.IsInvalid)
{
// assume that the hwnd was bad
throw new ElementNotAvailableException();
}
using (RemoteMemoryBlock rmem = new RemoteMemoryBlock(maxLength * sizeof(char), hProcess))
{
if (rmem.IsInvalid)
{
return false;
}
// Send the message...
if (Misc.ProxySendMessage(hwnd, uMsg, wParam, rmem.Address) == IntPtr.Zero)
{
return false;
}
// Read the string from the remote buffer
return rmem.ReadString(out str, maxLength);
}
}
}
// A generic GetItemText that sends a message to a control then reads memory out of the controls process.
internal static string GetItemText(IntPtr hwnd, int msg, int index, int textLen)
{
if (textLen <= 0)
{
return "";
}
using (SafeProcessHandle hProcess = new SafeProcessHandle(hwnd))
{
if (hProcess.IsInvalid)
{
// assume that the hwnd was bad
throw new ElementNotAvailableException();
}
using (RemoteMemoryBlock rmem = new RemoteMemoryBlock((textLen + 1) * sizeof(char), hProcess))
{
// Allocate memory for UNICODE string.
if (rmem.IsInvalid)
{
return "";
}
if (Misc.ProxySendMessage(hwnd, msg, new IntPtr(index), rmem.Address) != IntPtr.Zero)
{
string itemText;
// Read the string from the remote buffer
if (rmem.ReadString(out itemText, (textLen + 1)))
{
return itemText;
}
}
}
}
return "";
//ProcessorTypes localBitness;
//ProcessorTypes remoteBitness;
//GetProcessTypes(hwnd, out localBitness, out remoteBitness);
//if (localBitness == remoteBitness)
//{
// return "";
//}
//else if (remoteBitness == ProcessorTypes.Processor32Bit)
//{
//ToDo: Convert from 64-bit to 32-bit
// return "";
//}
//else if (remoteBitness == ProcessorTypes.Processor64Bit)
//{
//ToDo: Convert from 32-bit to 64-bit
// return "";
//}
//return "";
}