ITextHost class (textserv.h)
The ITextHost interface is used by a text services object to obtain text host services.
Inheritance
The ITextHost interface inherits from the IUnknown interface. ITextHost also has these types of members:
Methods
The ITextHost class has these methods.
| ITextHost::OnTxCharFormatChange Sets the default character format for the text host. |
| ITextHost::OnTxParaFormatChange Sets the default paragraph format for the text host. |
| ITextHost::TxActivate Notifies the text host that the control is active. |
| ITextHost::TxClientToScreen Converts text host coordinates to screen coordinates. |
| ITextHost::TxCreateCaret Creates a new shape for windowless rich edit control's caret. |
| ITextHost::TxDeactivate Notifies the text host that the control is now inactive. |
| ITextHost::TxEnableScrollBar Enables or disables one or both scroll bar arrows in the text host window. |
| ITextHost::TxGetAcceleratorPos Requests the special character to use for the underlining accelerator character. |
| ITextHost::TxGetBackStyle Requests the background style of the text host. |
| ITextHost::TxGetCharFormat Requests the text host's default character format. |
| ITextHost::TxGetClientRect Retrieves the client coordinates of the text host's client area. |
| ITextHost::TxGetDC Requests the device context for the text host window. |
| ITextHost::TxGetExtent Requests the native size of the control in HIMETRIC. |
| ITextHost::TxGetMaxLength Gets the text host's maximum allowed length for the text. |
| ITextHost::TxGetParaFormat Requests the text host's default paragraph format. |
| ITextHost::TxGetPasswordChar Requests the text host's password character. |
| ITextHost::TxGetPropertyBits Requests the bit property settings for the text host. |
| ITextHost::TxGetScrollBars Requests information about the scroll bars supported by the text host. |
| ITextHost::TxGetSelectionBarWidth Returns the size of selection bar in HIMETRIC. |
| ITextHost::TxGetSysColor Retrieves the text host's color for a specified display element. |
| ITextHost::TxGetViewInset Requests the dimensions of the white space inset around the text in the text host window. |
| ITextHost::TxImmGetContext Retrieves the Input Method Editor (IME) input context associated with the text services host. This method is used only in Asian-language versions of the operating system. |
| ITextHost::TxImmReleaseContext Releases an input context returned by the ITextHost::TxImmGetContext method and unlocks the memory associated with the context. This method is used only in Asian-language versions of the operating system. |
| ITextHost::TxInvalidateRect Specifies a rectangle for the text host to add to the update region of the text host window. |
| ITextHost::TxKillTimer Requests the text host to destroy the specified timer. |
| ITextHost::TxNotify Notifies the text host of various events. |
| ITextHost::TxReleaseDC Releases the device context obtained by the ITextHost::TxGetDC method. |
| ITextHost::TxScreenToClient Converts the screen coordinates to the text host window coordinates. |
| ITextHost::TxScrollWindowEx Requests the text host to scroll the content of the specified client area. |
| ITextHost::TxSetCapture Sets the mouse capture in the text host's window. |
| ITextHost::TxSetCaretPos Moves the caret position to the specified coordinates in the text host window. |
| ITextHost::TxSetCursor Establishes a new cursor shape (I-beam) in the text host's window. |
| ITextHost::TxSetFocus Sets the focus to the text host window. |
| ITextHost::TxSetScrollPos Sets the position of the scroll box (thumb) in the specified scroll bar and, if requested, redraws the scroll bar to reflect the new position of the scroll box. (ITextHost.TxSetScrollPos) |
| ITextHost::TxSetScrollRange Sets the minimum and maximum position values for the specified scroll bar in the text host window. |
| ITextHost::TxSetTimer Requests the text host to create a timer with a specified time-out. |
| ITextHost::TxShowCaret Shows or hides the caret at the caret position in the text host window. |
| ITextHost::TxShowScrollBar Shows or hides the scroll bar in the text host window. |
| ITextHost::TxViewChange Indicates to the text host that the update region has changed. |
Remarks
You must implement the ITextHost interface before you call the CreateTextServices function.
Applications do not call the ITextHost methods. A text services object created by the CreateTextServices function calls the interface methods.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista [desktop apps only] |
| Minimum supported server | Windows Server 2003 [desktop apps only] |
| Target Platform | Windows |
| Header | textserv.h |