public static void StringToHGlobalAuto()
{
String s = null;
// passing null string should return 0
Assert.Equal(0, (long)Marshal.StringToHGlobalAuto(s));
s = "Hello World";
IntPtr ptr = Marshal.StringToHGlobalAuto(s);
// make sure the native memory is correctly laid out
for (int i = 0; i < s.Length; i++)
{
char c = (char)Marshal.ReadInt16(IntPtr.Add(ptr, i << 1));
Assert.Equal(s[i], c);
}
// make sure if we convert back to string we get the same value
String s2 = Marshal.PtrToStringAuto(ptr);
Assert.Equal(s, s2);
// free the native memory
Marshal.FreeCoTaskMem(ptr);
}
/// <include file='doc\ToolBarButton.uex' path='docs/doc[@for="ToolBarButton.GetTBBUTTONINFO"]/*' />
/// <devdoc>
/// Returns a TBBUTTONINFO object that represents this ToolBarButton.
/// </devdoc>
internal NativeMethods.TBBUTTONINFO GetTBBUTTONINFO(bool updateText, int newCommandId) {
NativeMethods.TBBUTTONINFO button = new NativeMethods.TBBUTTONINFO();
button.cbSize = Marshal.SizeOf(typeof(NativeMethods.TBBUTTONINFO));
button.dwMask = NativeMethods.TBIF_IMAGE
| NativeMethods.TBIF_STATE | NativeMethods.TBIF_STYLE;
// Comctl on Win98 interprets null strings as empty strings, which forces
// the button to leave space for text. The only workaround is to avoid having comctl
// update the text.
if (updateText) {
button.dwMask |= NativeMethods.TBIF_TEXT;
}
button.iImage = ImageIndexer.ActualIndex;
if (newCommandId != commandId) {
commandId = newCommandId;
button.idCommand = newCommandId;
button.dwMask |= NativeMethods.TBIF_COMMAND;
}
// set up the state of the button
//
button.fsState = 0;
if (enabled) button.fsState |= NativeMethods.TBSTATE_ENABLED;
if (partialPush && style == ToolBarButtonStyle.ToggleButton) button.fsState |= NativeMethods.TBSTATE_INDETERMINATE;
if (pushed) button.fsState |= NativeMethods.TBSTATE_CHECKED;
if (!visible) button.fsState |= NativeMethods.TBSTATE_HIDDEN;
// set the button style
//
switch (style) {
case ToolBarButtonStyle.PushButton:
button.fsStyle = NativeMethods.TBSTYLE_BUTTON;
break;
case ToolBarButtonStyle.ToggleButton:
button.fsStyle = NativeMethods.TBSTYLE_CHECK;
break;
case ToolBarButtonStyle.Separator:
button.fsStyle = NativeMethods.TBSTYLE_SEP;
break;
}
if (text == null) {
button.pszText = Marshal.StringToHGlobalAuto("\0\0");
}
else {
string textValue = this.text;
PrefixAmpersands(ref textValue);
button.pszText = Marshal.StringToHGlobalAuto(textValue);
}
return button;
}
/// <summary>
/// Returns a TBBUTTONINFOW object that represents this ToolBarButton.
/// </summary>
internal ComCtl32.TBBUTTONINFOW GetTBBUTTONINFO(bool updateText, int newCommandId)
{
var button = new ComCtl32.TBBUTTONINFOW
{
cbSize = (uint)Marshal.SizeOf <ComCtl32.TBBUTTONINFOW>(),
dwMask = ComCtl32.TBIF.IMAGE | ComCtl32.TBIF.STATE | ComCtl32.TBIF.STYLE
};
// Older platforms interpret null strings as empty, which forces the button to
// leave space for text.
// The only workaround is to avoid having comctl update the text.
if (updateText)
{
button.dwMask |= ComCtl32.TBIF.TEXT;
}
button.iImage = ImageIndexer.ActualIndex;
if (newCommandId != commandId)
{
commandId = newCommandId;
button.idCommand = newCommandId;
button.dwMask |= ComCtl32.TBIF.COMMAND;
}
// set up the state of the button
button.fsState = 0;
if (enabled)
{
button.fsState |= ComCtl32.TBSTATE.ENABLED;
}
if (partialPush && style == ToolBarButtonStyle.ToggleButton)
{
button.fsState |= ComCtl32.TBSTATE.INDETERMINATE;
}
if (pushed)
{
button.fsState |= ComCtl32.TBSTATE.CHECKED;
}
if (!visible)
{
button.fsState |= ComCtl32.TBSTATE.HIDDEN;
}
// set the button style
switch (style)
{
case ToolBarButtonStyle.PushButton:
button.fsStyle = (byte)ComCtl32.TBSTYLE.BUTTON;
break;
case ToolBarButtonStyle.ToggleButton:
button.fsStyle = (byte)ComCtl32.TBSTYLE.CHECK;
break;
case ToolBarButtonStyle.Separator:
button.fsStyle = (byte)ComCtl32.TBSTYLE.SEP;
break;
}
if (text == null)
{
button.pszText = Marshal.StringToHGlobalAuto("\0\0");
}
else
{
string textValue = text;
PrefixAmpersands(ref textValue);
button.pszText = Marshal.StringToHGlobalAuto(textValue);
}
return(button);
}