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| manufacturer — Static property in class System.capabilities | 
 | A string that indicates the manufacturer of Flash Player, in the format "Macromedia OSName" (OSName could be "Windows", "Macintosh", "Linux", or "Other OS Name"). | 
| mapBitmap — Property in class flash.filters.DisplacementMapFilter | 
 | A BitmapData object containing the displacement map data. | 
| mapPoint — Property in class flash.filters.DisplacementMapFilter | 
 | A flash.geom.Point value that contains the offset of the upper-left corner of the target movie clip from the upper-left corner of the map image. | 
| Math — Class in Top Level | 
 | The Math class is a top-level class whose methods and properties you can use without using a constructor. | 
| matrix — Property in class flash.filters.ColorMatrixFilter | 
 | An array of 20 elements for 4 x 5 color transform. | 
| matrix — Property in class flash.filters.ConvolutionFilter | 
 | An array of values used for matrix transformation; returns a copy. | 
| matrix — Property in class flash.geom.Transform | 
 | A transformation Matrix object containing values that affect the scaling, rotation, and translation of the movie clip. | 
| Matrix — Class in package flash.geom | 
 | The flash.geom.Matrix class represents a transformation matrix that determines how to map points from one   coordinate space to another. | 
| Matrix([a:Number], [b:Number], [c:Number], [d:Number], [tx:Number], [ty:Number]) — Constructor in class flash.geom.Matrix | 
 | Creates a new Matrix object with the specified parameters. | 
| matrixX — Property in class flash.filters.ConvolutionFilter | 
 | The x dimension of the matrix (the number of columns in the matrix). | 
| matrixY — Property in class flash.filters.ConvolutionFilter | 
 | The y dimension of the matrix (the number of rows in the matrix). | 
| max(x:Number, y:Number) — Static method in class Math | 
 | Evaluates x and y and returns the larger value. | 
| maxChars — Property in class TextField | 
 | Indicates the maximum number of characters that the text field can contain. | 
| maxhscroll — Property in class TextField | 
 | Indicates the maximum value of TextField.hscroll. | 
| maxLevel — Static property in class flash.text.TextRenderer | 
 | The adaptively sampled distance fields (ADFs) quality level for advanced anti-aliasing. | 
| maxscroll — Global property | 
 | Deprecated since Flash Player 5 — This property was deprecated in favor of TextField.maxscroll. 
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| maxscroll — Property in class TextField | 
 | Indicates the maximum value of TextField.scroll. | 
| MAX_VALUE — Static property in class Number | 
 | The largest representable number (double-precision IEEE-754). | 
| mbchr(number:Number) — Global function | 
 | Deprecated since Flash Player 5 — This function was deprecated in favor of the String.fromCharCode() method. 
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| mblength(string:String) — Global function | 
 | Deprecated since Flash Player 5 — This function was deprecated in favor of the methods and properties of the String class. 
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| mbord(character:String) — Global function | 
 | Deprecated since Flash Player 5 — This function was deprecated in favor of String.charCodeAt(). 
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| mbsubstring(value:String, index:Number, count:Number) — Global function | 
 | Deprecated since Flash Player 5 — This function was deprecated in favor of String.substr(). 
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| menu — Property in class Button | 
 | Associates the ContextMenu object contextMenu with the button object my_button. | 
| menu — Property in class MovieClip | 
 | Associates the specified ContextMenu object with the movie clip. | 
| menu — Property in class TextField | 
 | Associates the ContextMenu object contextMenu with the text field my_txt. | 
| merge(sourceBitmap:BitmapData, sourceRect:Rectangle, destPoint:Point, redMult:Number, greenMult:Number, blueMult:Number, alphaMult:Number) — Method in class flash.display.BitmapData | 
 | Performs per-channel blending from a source image to a destination image. | 
| message — Property in class Error | 
 | Contains the message associated with the Error object. | 
| Microphone — Class in Top Level | 
 | The Microphone class lets you capture audio from a microphone attached to the computer that is running Flash Player. | 
| min(x:Number, y:Number) — Static method in class Math | 
 | Evaluates x and y and returns the smaller value. | 
| MIN_VALUE — Static property in class Number | 
 | The smallest representable number (double-precision IEEE-754). | 
| MMExecute(command:String) — Global function | 
 | Lets you issue Flash JavaScript API (JSAPI) commands from ActionScript.
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| mode — Property in class flash.filters.DisplacementMapFilter | 
 | The mode for the filter. | 
| modificationDate — Property in class flash.net.FileReference | 
 | The date that the file on the local disk was last modified. | 
| motionLevel — Property in class Camera | 
 | A numeric value that specifies the amount of motion required to invoke Camera.onActivity(true). | 
| motionTimeOut — Property in class Camera | 
 | The number of milliseconds between the time the camera stops detecting motion and the time Camera.onActivity (false) is invoked. | 
| Mouse — Class in Top Level | 
 | The Mouse class is a top-level class whose properties and methods you can access without using a constructor. | 
| mouseWheelEnabled — Property in class TextField | 
 | A Boolean value that indicates whether Flash Player should automatically scroll multiline text fields when the mouse pointer clicks a text field and the user rolls the mouse wheel. | 
| moveTo(x:Number, y:Number) — Method in class MovieClip | 
 | Moves the current drawing position to (x, y). | 
| MovieClip — Dynamic class in Top Level | 
 | The methods for the MovieClip class provide the same functionality as actions that target movie   clips. | 
| MovieClipLoader — Class in Top Level | 
 | This class lets you implement listener callbacks that provide status information while SWF, JPEG,   GIF, and PNG files are being loaded into movie clips. | 
| MovieClipLoader() — Constructor in class MovieClipLoader | 
 | Creates a MovieClipLoader object that you can use to implement a number of listeners to respond to events while a SWF, JPEG, GIF, or PNG file is downloading. | 
| multiline — Property in class TextField | 
 | Indicates whether the text field is a multiline text field. | 
| muted — Property in class Camera | 
 | A Boolean value that specifies whether the user has denied access to the camera (true) or allowed access (false) in the Flash Player Privacy Settings panel. | 
| muted — Property in class Microphone | 
 | A Boolean value that specifies whether the user has denied access to the microphone (true) or allowed access (false). | 
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