private HRESULT SaveHtmlToHandle(IntPtr handle, string str)
{
if (handle == IntPtr.Zero)
{
return(HRESULT.E_INVALIDARG);
}
IntPtr newHandle = IntPtr.Zero;
UTF8Encoding encoding = new UTF8Encoding();
byte[] bytes = encoding.GetBytes(str);
newHandle = Kernel32.GlobalReAlloc(
handle,
(uint)bytes.Length + 1,
Kernel32.GMEM.MOVEABLE | Kernel32.GMEM.DDESHARE | Kernel32.GMEM.ZEROINIT);
if (newHandle == IntPtr.Zero)
{
return(HRESULT.E_OUTOFMEMORY);
}
IntPtr ptr = Kernel32.GlobalLock(newHandle);
if (ptr == IntPtr.Zero)
{
return(HRESULT.E_OUTOFMEMORY);
}
try
{
UnsafeNativeMethods.CopyMemory(ptr, bytes, bytes.Length);
Marshal.Copy(new byte[] { 0 }, 0, (IntPtr)((long)ptr + bytes.Length), 1);
}
finally
{
Kernel32.GlobalUnlock(newHandle);
}
return(HRESULT.S_OK);
}
private HRESULT SaveStringToHandle(IntPtr handle, string str, bool unicode)
{
if (handle == IntPtr.Zero)
{
return(HRESULT.E_INVALIDARG);
}
IntPtr newHandle = IntPtr.Zero;
if (unicode)
{
uint byteSize = (uint)str.Length * 2 + 2;
newHandle = Kernel32.GlobalReAlloc(
handle,
byteSize,
Kernel32.GMEM.MOVEABLE | Kernel32.GMEM.DDESHARE | Kernel32.GMEM.ZEROINIT);
if (newHandle == IntPtr.Zero)
{
return(HRESULT.E_OUTOFMEMORY);
}
IntPtr ptr = Kernel32.GlobalLock(newHandle);
if (ptr == IntPtr.Zero)
{
return(HRESULT.E_OUTOFMEMORY);
}
char[] chars = str.ToCharArray(0, str.Length);
UnsafeNativeMethods.CopyMemoryW(ptr, chars, chars.Length * 2);
}
else
{
int pinvokeSize = UnsafeNativeMethods.WideCharToMultiByte(0 /*CP_ACP*/, 0, str, str.Length, null, 0, IntPtr.Zero, IntPtr.Zero);
byte[] strBytes = new byte[pinvokeSize];
UnsafeNativeMethods.WideCharToMultiByte(0 /*CP_ACP*/, 0, str, str.Length, strBytes, strBytes.Length, IntPtr.Zero, IntPtr.Zero);
newHandle = Kernel32.GlobalReAlloc(
handle,
(uint)pinvokeSize + 1,
Kernel32.GMEM.MOVEABLE | Kernel32.GMEM.DDESHARE | Kernel32.GMEM.ZEROINIT);
if (newHandle == IntPtr.Zero)
{
return(HRESULT.E_OUTOFMEMORY);
}
IntPtr ptr = Kernel32.GlobalLock(newHandle);
if (ptr == IntPtr.Zero)
{
return(HRESULT.E_OUTOFMEMORY);
}
UnsafeNativeMethods.CopyMemory(ptr, strBytes, pinvokeSize);
Marshal.Copy(new byte[] { 0 }, 0, (IntPtr)((long)ptr + pinvokeSize), 1);
}
if (newHandle != IntPtr.Zero)
{
Kernel32.GlobalUnlock(newHandle);
}
return(HRESULT.S_OK);
}