EM_SETBIDIOPTIONS message
The EM_SETBIDIOPTIONS message sets the current state of the bidirectional options in the rich edit control.
Parameters
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wParam
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This parameter is not used; it must be zero.
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lParam
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Pointer to a BIDIOPTIONS structure that indicates how to set the state of the bidirectional options in the rich edit control.
Return value
This message does not return a value.
Remarks
The rich edit control must be in plain text mode or EM_SETBIDIOPTIONS will not do anything.
In plain text controls, EM_SETBIDIOPTIONS automatically determines the paragraph direction and/or alignment based on the context rules. These rules state that the direction and/or alignment is derived from the first strong character in the control. A strong character is one from which text direction can be determined (see Unicode Standard version 2.0). The paragraph direction and/or alignment is applied to the default format.
EM_SETBIDIOPTIONS only switches the default paragraph format to RTL (right to left) if it finds an RTL character,
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2003 [desktop apps only] |
| Redistributable |
Rich Edit 3.0 |
| Header |
|
See also
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Reference