unfreeze - Win32 Multimedia Programmer's Reference

Custom Search

	Overview

	Group

	Quick Info

unfreeze

The unfreeze command reenables video acquisition to the frame buffer after it has been disabled by the freeze command. Digital-video, VCR, and video-overlay devices recognize this command.

wsprintf(lpstrCommand, "unfreeze %s %s %s", lpszDeviceID, lpszUnfreeze,
lpszFlags);

Parameters
lpszDeviceID
Identifier of an MCI device. This identifier or alias is assigned when the device is opened.

lpszUnfreeze
Flag for reenabling video acquisition to the frame buffer. The following table lists device types that recognize the unfreeze command and the flags used by each type:

digitalvideo	at rectangle
overlay	at rectangle
cr	input output

The following table lists the flags that can be specified in the lpszUnfreeze parameter and their meanings:

at rectangle	Specifies the region that will have video acquisition reenabled. The rectangle is relative to the video buffer origin and is specified as X1 Y1 X2 Y2. The coordinates X1 Y1 specify the upper left corner of the rectangle, and the coordinates X2 Y2 specify the width and height.
input	Unfreeze the input image.
output	Unfreeze the output image. If neither "input" nor "output" is given, "output" is assumed.

lpszFlags

Can be "wait", "notify", or both. For digital-video and VCR devices, "test" can also be specified. For more information about these flags, see The Wait, Notify, and Test Flags.

Return Values
Returns zero if successful or an error otherwise.

Remarks
The following command unfreezes a region of the video buffer:

unfreeze vboard at 10 20 90 165

See Also
freeze

Last news from Greatis Software

    Nostalgia .Net     .Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More »

Recommended software for developers

    Ultimate Pack     Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More »

    Form Designer .Net     Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More »

    Print Suite .Net     Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More »

    Gradient Controls .Net     Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More »

    Greatis iGrid     iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More »

All the contacts and projects

Dmitry Vasiliev (just.dmitry)

More Online Helps

Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages

greatis just4fun network