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This SDK only works with devices released within the past 3 years. We regularly optimize and update the SDK to ensure compatibility and performance. We do not guarantee compatibility or provide technical support for devices older than 3 years.

# NET_SDK_PlayBackControlSync

### Interface Definition

C++C#

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    BOOL NET_SDK_PlayBackControlSync(
        DWORD dwControlCode,
        DWORD dwInValue,
        DWORD* lpOutValue);

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    public static extern Boolean NET_SDK_PlayBackControlSync(
        UInt32 dwControlCode,
        UInt32 dwInValue,
        ref int lpOutValue);

### Function Description

Controls the status of synchronous playback of recorded videos.

### Parameter Description

Parameters | Type | Remark
--- | --- | ---
dwControlCodein | DWORD | Commands for controlling video playback status, refer to `NET_SDK_PLAYCTRL_TYPE`.
dwInValuein | DWORD | The parameter to be set, for example, when setting the progress of file playback, this parameter indicates the progress value; when starting playback, this parameter indicates the file position (Byte) for breakpoint resume.
lpOutValueout | DWORD* | The parameters obtained, such as the total time of the currently playing file, this parameter is the total time obtained.

### Return Value

- Type：BOOL

- Remark：Returns TRUE if successful, FALSE if failed.

### Remarks

Whether the second parameter in this interface needs to enter a value depends on the control command. In the NET_SDK_PLAYSETPOS command, this parameter indicates the playback progress. When the control command is to start playing, the value of the second parameter indicates the offset of the current file. If the value is 0, it means playing from the beginning of the file. If the value is not 0, it indicates the file position (Byte) of the breakpoint resume. The third parameter in this interface indicates the corresponding parameter obtained by the current control command operation.

Error Code