| M17NObjectHead | The first member of a managed object | 
| MCodingInfoISO2022 | Structure for a coding system of type MCODING_TYPE_ISO_2022 | 
| MCodingInfoUTF | Structure for extra information about a coding system of type MCODING_TYPE_UTF | 
| MConverter | Structure to be used in code conversion | 
| MDrawControl | Type of a text drawing control | 
| MDrawGlyph | Type of information about a glyph metric and font | 
| MDrawGlyphInfo | Type of information about a glyph | 
| MDrawMetric | Type of metric for gylphs and texts | 
| MDrawTextItem | Type of text items | 
| MFaceBoxProp | Type of box spec of face | 
| MFaceHLineProp | Type of horizontal line spec of face | 
| MInputContext | Structure of input context | 
| MInputDriver | Structure of input method driver | 
| MInputGUIArgIC | Type of the argument to the function minput_create_ic() | 
| MInputMethod | Structure of input method | 
| MInputXIMArgIC | Structure pointed to by the argument arg of the function minput_create_ic() | 
| MInputXIMArgIM | Structure pointed to by the argument arg of the function minput_open_im() | 
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